Facing the conflict caused by greed, the characters who were originally scattered will gather together again: Cha Hyun-soo (played by Song Kang) wakes up and finds that he has become a monster; Byun Sang-wook (played by Lee Jin-wook) whose body is occupied by Zheng Yiming; Seo Yi Kyung (played by Lee Shi-hyun) became half-human and half-monster; Lee Eun-hyuk (played by Lee Dae-hyun) emerged from the violently shaking monster cocoon; Lee Eun-you (played by Ko Min-seo) persevered and continued to search for his brother Eun-hyuk;Private Park Chan-young (played by Jung Jin-young) returns to the field; Sergeant Tak In-hwan (played by Yoo Oh-sung) still hides the fact that he has symptoms of monster transformation; Dr. Im (played by Oh Jung-se) has shown unusual interest in monster transformation; Kim Young-hoo JungA soldier (played by Kim Moo-yeol) meets new survivors on Yuldo Island; and a girl (played by Kim Seil-ah) who has the ability to turn other people into monsters appears.

On Lido Island, Nam Sang-won possessed Byon Sang-wook's body and showed the doctor his original human body, allowing the doctor to understand the ins and outs of the incident.In a flashback, the Doctor imprisons Minami Aihara and defiantly calls the trapped Yi Kyung, claiming that he is dead.The angry Minami Aihara escaped from his original body after evolving and possessed Shang Yu, becoming a key role.But he does not intend to kill the doctor now. Instead, he thanks him and decides to go to Chi Cheng, the leader of Li Island, together. The doctor recognizes Chi Cheng as the patient MH3.

Angry at Dr. Kim's experiment, Ji Sung tortured Sergeant Kim and his men and gave the injured Sergeant Kim a gun. Choi Yong-suk, Jong Hyun and Seo-jin were tied to the ceiling, and Sergeant Kim could only take one away.subordinates.Chi Sung expressed that he wanted to push special humans to the point where they could control themselves into monsters.However, Sergeant Kim points his gun at a monster hunter, causing Jong-hyun to be killed.At this time, Sergeant Kim pretended to kill Seo-jin, but actually shot his rope and ran away together.They escaped from the monsters on the ground. Nan Xiangyuan was bored and ordered the monster Ziyan to attack humans, and then left with other monsters transformed into humans.Shi Can arrives with a flamethrower and Zi Yan warns him, but he doesn't listen.A monster severely injured Ruizhen. Ziyan, who transformed into a monster, killed the monster. Shi Can ran to Ruizhen and Sergeant Jin.The doctor observed Ziyan and then joined Minami Aihara's team heading to the stadium.

The survivors at the stadium discovered that Seungwan was missing and worried that he had turned into a monster.Ye-seul is caught due to the blackout incident, and squad leader Ji tries to get her daughter Ye-seul to leave.During the plea, it was revealed that Team Leader Ji was not Ye-seul’s biological mother, and that her real mother died last year after turning into a monster.Ye-seul refused to leave, so Team Leader Chi dragged her to the basement, where her son's monster lived.Squad Leader Chi was surprised to see her monster appearance, and Ye Seul took the opportunity to knock her out.Sergeant Zhuo heard the commotion, but his men could not find the entrance to the basement.

Cha Hyun-soo entered Yi-kyung's consciousness and saw the monster Yi-kyung torturing the human Yi-kyung.Chanrong was worried about Eunyou and decided to go back to find her, when Ha Ni appeared.Ha Ni and Chan Rong met Eun You who was waiting in front of the pit.A monster is lured into the pit by Yi-kyung's screams.Chanyoung and Eunyou jumped down to protect Cha Hyunsu and Yi Kyung.The battle was difficult and the rope caught fire. Chanrong asked Ha Ni to rescue Eunyou and fight alone.Due to lack of ammunition and gasoline, Chanrong gave up, but Cha Xianxiu awakened Yi Jing, killed the monster and pulled Chanrong and Yi Jing up.Yi-kyung's burns recover, but her eyes become human-like.The camera switched to Yi Jing's daughter, the mysterious girl heading to the stadium.

Yi Jing wakes up, her eyes are back to normal but the wound on her arm has not healed.Eun Yoo explains that Hyun Soo restored her to a human, but Hyun Soo is still sleeping.Yi Jing is grateful and decides to find her daughter, fearing that she will turn humans into monsters.Eunyou wishes her good luck and stays to take care of Hyunsu and worry about her brother.Ho-sang is in coma, Chan-young is worried, and Ha-ni feels offended because Ho-sang doesn't trust her.In the flashback, Hao Xiang killed Ha Ni's mutated parents to save Ha Ni, and Ha Ni angrily threatened to kill Hao Xiang if he mutated.Haosang gives her food in exchange for the promise.Now, Ho-sang wakes up but is depressed, unable to understand that Ha-ni is with a monster sympathizer, warning her not to make the same mistakes as her parents.Ha Ni angrily cuffs Hao Xiang, believing that the monster can be saved and killing is pointless.Chanyoung comforts her as she leaves, and Ha-ni believes that Ho-sang will eventually change his mind.

Kurishima's monster and the doctor steal Sergeant Kim's car and head to the stadium.Minami Aihara tells the doctor that he has a child.Yi-kyung loses consciousness before giving birth, and Nam Sang-won gives her a gift and feels the baby.Minami Aihara and Yi Kyung's daughter's arms turned black as she entered the stadium.Minami Aihara killed a monster Cocoon and found the hiding person. He said that monsters do not harm Cocoon, so Minami Aihara took him away.In the stadium, Sergeant Zhuo found the basement and rescued Ye-seul.They tied up squad leader Chi and prepared to interrogate her.In the flashback, monitor Chi’s son showed symptoms and she locked him in the basement.Every time Sergeant Zhuo expelled the infected, she was brought into the basement and became food for her son.Sergeant Zhuo said that there was no treatment for monster transformation, so he killed his infected son.After Sergeant Zhuo said he would kill her son, she tried to commit suicide, but Ye-seul stopped her.

Yi-kyung's daughter integrates into the group of survivors and notices that Young-soo is being bullied.He threatens mutant revenge and Yi-kyung's daughter tries to help, but is stopped by Ye-seul and taken to Jin-ok.At this time, the doctor and Awashima's monsters appeared. Minami Aihara broke through the entrance to kill the soldiers, and asked Sergeant Zhuo to gather the children, claiming that he only wanted his own children.Chi Sung takes care of the injured soldiers and announces that those with symptoms are becoming new humans.The soldiers asked the doctor for news about Sergeant Kim's team.Twelve hours ago, the doctor discovered that Shi Can and Sergeant Jin were injured and could only save one person.Seok-chan gives Sergeant Kim medicine and asks to save other humans.The doctor gave them blood transfusions and left.Now Sergeant Kim is recovering, but Seok Chan is about to die.The Doctor has a drug that turns infected people into special monsters, and may share it with Sergeant Zhuo.

Honey runs into the trailer to find her special plant leaves, revealing her addiction.Hao Xiang thought she had mutated, but it was actually him who mutated.After she leaves, he breaks free and fantasizes about being told to kill everyone.Ha Ni found him trying to commit suicide in the car and hurriedly found Hyun Soo, hoping to save Ho Sang.Hyun Soo attacks Ha Ni with her wings in her sleep, but Eun Yoo wakes up Hyun Soo.Ha-ni and Chan-young go back outside and Ha-sang begs Ha-ni to kill him, but she can't and Ha-sang crashes the car.Dies in the explosion, attracting monsters to attack Honey.Chanyoung tries to save her, and inside Eunyou pleads with Hyunsu to wake up.He wakes up and turns into the monster Hyun Soo, his eyes turn blue, kills the monster and chokes Chan Rong.

Eunyou injects anesthetic to make Hyunsu unconscious.Sergeant Kim found the burned Eun-wook on Awashima. He begged Sergeant Kim to kill him, but Sergeant Kim took him away.Sergeant Zhuo learned that Squad Leader Chi had betrayed his son's hiding place in order to allow the survivors to escape, and asked her to help escape from the gymnasium.Yi-kyung sneaks into the gym and meets the doctor, refusing to believe that Minami Sang-won is still alive and beats the doctor.After Minami Aihara appeared, the doctor collected Yi Jing and confirmed that he was still alive.Minami Aihara said that he was attracted to Yi Kyung after the mutation and wanted to possess her daughter's body because she was the perfect host.Yi Kyung asks how to kill Nam Sang Won, and the doctor says that only Hyun Soo can do it.

Outside, Young-soo asks Yi-kyung her daughter’s name.She said she had no name, and Yingxiu suggested giving her a name.Nam Sang-won recognized her and claimed to be her father, while Yi-kyung witnessed the whole process.When Sergeant Kim's radio call went unanswered and he was at a loss, Eun-hyuk took him to church.Sergeant Kim notices the black mark on Eun Hyuk’s neck and asks if it was caused by a special infection.Eun-hyuk tells Sergeant Kim that he can stay and promises that he will be safe.Eunhyuk slits his own throat and forms a cocoon on his body.A monster that was about to attack Eun Hyuk suddenly knelt down, leaving Sergeant Kim dumbfounded.

Eun Yoo plans to stop Yi Kyung from living with Hyun Soo.The mutated Hyun Soo mocks and threatens her, but she is undeterred.Hyun Soo makes a bet and gives Eun Yoo three days to find the human Hyun Soo, otherwise she will lose him.Ha Ni mourns Ho Sang and then joins Chan Young, Eun Yoo and Hyun Soo.Nam Sang-won pretends to be kind to Yi-kyung's daughter, while Yi-kyung observes from a distance.Chi Cheng did not trust Nam Xiangyuan and sent someone to follow him.They hear Sergeant Kim's radio message and are angry that Zi Yan failed to kill everyone, telling her to wait to kill Sergeant Kim.Ziyan found that the good guy wanted to leave and dragged her to the priest.Squad Leader Ji came to Ye Seul, and Ye Seul was very angry, but Squad Leader Ji couldn't forgive herself.She gave the stadium blueprint to Sergeant Zhuo and locked it in the basement, leaving Ye-seul to cry.

The mutated Hyun-soo cuts her hair short and wears a suit.While Ha Ni is recovering from drug addiction, Eun Yoo goes looking for herbal medicine.When left alone, Hyun Soo asked Chan Rong why he stayed here.Human Xianxiu likes Canrong, but he doesn't dare to express it, and he doesn't know if Canrong feels the same way.They realize that Eun Yoo has been away for too long and Hyun Soo goes to find her.At the edge of the woods, Minami Aihara tells Yi Kyung's daughter that if she tells him how to control the monster, he will give her everything she wants.Eager to please him, Yi-kyung's daughter summons a giant protein monster.

Mercury mutant Jae-jin is excited to play with the Protein Monster.Eun-you is caught in the crossfire and Hyun-soo the monster impatiently goes to save her.After a fierce battle, Hyun Soo finally defeated the protein monster.Jae Jin excitedly wanted to meet Hyun Soo, but Hyun Soo cut his hand.Hyun-soo notices that Jae-jin is weak and drags him over after learning that Nam Sang-won is at the gym.Three masked mutants show up at the gym looking for someone, and Minami Aihara arrives and kills them.Afterwards, he asks his daughter what she wants in return, and the scene cuts to her taking back Ying-soo's baseball from the bully and taking a kid's glove to put on.Yi Kyung finds her daughter and pulls her into a hug.In the secret exit ventilator, Yi-kyung apologizes for everything, saying she doesn't hate her and was once scared, but hopes her daughter will give her a chance.She would wait in the air duct and if her daughter decided, they would leave together.

Minami Aihara locked up the masked mutants and they turned into pupae.In order to prevent Nam Sang-won from getting angry because of the soldiers looking for Sergeant Kim, Sergeant Zhuo confessed that he was infected and won Nam Sang-won's trust.The mutant asks Sergeant Zhuo if he has seen pupae, as they attract the masked mutant.The soldiers discovered that Squad Leader Chi's son had turned into a pupa.Minami Xiangyuan told Sergeant Zhuo that these masked mutants claiming to be New Humans were harassing them, but they would turn into pupae and be reborn every time they were killed.He's been killing all the mutants who come looking for something.The Doctor is interested in the glowing, beating pupae.After Sergeant Zhuo exposed himself, he rushed to find the doctor to discuss the next steps for his complete mutation.The Doctor shows the chrysalis shell and says that Sergeant Zhuo needs to fight a new human before fully mutating.

In the church, Eunhyuk says that chrysalis are like hearts, and in addition to being reborn, they are also quick learners.He tells Sergeant King that this is the next step in evolution, but mutants threaten them.The new humans just want to find others of their kind and try to survive.Eun-hyuk asks Sergeant Kim to take him to the gym.As Sergeant Kim gathers supplies, Eun-hyuk finds family photos in old clothes and takes them.Sergeant Kim asks him if he remembers human memory, but Eun-hyuk avoids answering.Eun-yo reunites with Chan-young and Ha-ni and heads to the gym because she believes Hyun-soo is there.Jae-jin is confused about Hyun-soo's behavior, and the monster Hyun-soo says it's all for human Hyun-soo.At this time, Jae-jin's hand regenerates and he burns Hyun-soo before running away.Meanwhile, Young-soo discovers the baseball that Yi-kyung’s daughter got for him.He advises her to go with her mother without regrets and gives her the pin that Mr. An gave to his late sister.Someone seemed to hear it.

In the tunnel, Yi-kyung’s daughter asks Yi-kyung if she has a name.Before they could answer, Minami Aihara found them.In what looks like a touching reunion, he hugs Yi Kyung and she puts down her pistol.But then she stabs him and tells Yi-kyung's daughter to run away.He angrily attacks both men.In desperation, Yi-kyung begs him to take her, but he reveals his true colors, snarling that her worth ends the moment she gives birth to the mysterious girl.She shoots him in the face in an attempt to get the mysterious girl to escape.Yi-kyung reveals her daughter's name is Seo Yi-soo, at which point Nam Sang-won fatally stabs Yi-kyung.Yi-soo cries, takes off her gloves, and tries to transform Yi-kyung, but it doesn't work since she's dead.

Minami Aihara is surprised that Yi Kyung transforms from a monster back into a human.Yi Xiu once told him that she turned her mother into a monster, but Minami Aihara didn't care how she turned back into a human.He grabs Yi-soo and tries to control her, but she screams to make him let go.In frustration, he drags her back and locks her in the cabin.Meanwhile, Jae-jin confronts the monster Hyun-soo and thinks she's making progress, but Hyun-soo just drags him back to the gym.Soon, Sergeant Kim and Eunhyuk's car met Eunyou's car, and she was shocked to see her brother.Sergeant Kim spots Hyun Soo and Jae Jin and crashes into them.After Sergeant Kim takes down Jae-jin to avenge his fallen men, Eun-hyuk fights with Hyun-soo and Hyun-soo is trapped on the bus.

Chanrong found out that Jae-jin was about to attack Sergeant Kim and saved him.But Jae-jin’s target was Hyun-soo, who surrounded the bus with shuiyi and escaped.Sergeant Kim wanted to take Eunyou away, but she refused, so he had to leave with Chanyoung and Ha Ni.On the bus, Eun-hyuk angers Hyun-soo, giving him a chance to escape.Outside, Eun-hyuk finds Eun-you waiting, but he’s indifferent.Eun-yo tries to get answers from him, and he tells her that he is a metahuman who has lost his emotions, and mocks her for mourning his death.But Eunyou refuses to give up on him and Hyunsu.

At the gym, a disappointed Minami Aihara asks the doctor why he can't swap bodies with his daughter.They reasoned that Minami Aihara needed to be near death to do this.So, Minami Aihara ordered the survivors in the gymnasium to prepare a bonfire.Taking advantage of the chaos, the infected Ki-chun shows off his symptoms.Yingxiu heard that Yixiu was arrested and went to find her.The priest asked Ye-seul about Sun-hwa, and she said that the woman had been calling someone named Yongjun.Outside, Chanyoung, Sergeant Kim, and Ha Ni watch Jae Jin enter the gym.While everyone is distracted, the doctor asks Sergeant Zhuo to capture Ziyan and cut open her stomach to remove something that can turn infected people into monsters.

Yingxiu took advantage of the chaos to find the hut, tried to release Yixiu, and expressed his willingness to accompany her.But Yixiu remembered that Yingxiu once wanted to be a monster, so she turned him into a monster too.At this moment, Cheol Jong found Yi Xiu alone in the cabin.After learning that Yi Xiu was missing, Minami Xiangyuan gathered everyone and declared that he would use his daughter's power to make them all stronger, and asked everyone to help find her.After disbanding, Team Crow assured Sergeant Zhuo that they would not abandon him even if he was infected.Ye-seul tells Jin-ok that the team plans to secretly let some people escape and find Young-soo.Back on the bus, Eunhyuk couldn't wait and decided to leave. Eunyou blamed him for abandoning others. At this time, Xianxiu also took the opportunity to escape.

Monster Hyun Soo realizes that he cannot break the constraints of the bus alone.He made spiritual contact with human Xianxiu and complained about worrying about the Li brothers and sisters, but he also realized that he was a part of Xianxiu, but a neglected part.He wanted to know who would prevail if the two became one, so he merged with the human Xianxiu.Hyun Soo finally breaks through his bonds and appears in human form.He attacks Eunhyuk but only destroys part of his wings.Hyun-soo calls it a gift and says Eun-hyuk will help him.Later, he reunites with Eunyou, who is relieved to have him back.The three of them went to the gym together, and Eunyou kept recalling his childhood with Eunhyuk, pointing out that the new superhumans learn quickly and can also feel emotions.Eunhyuk expresses happiness that her injured foot has healed, and she smiles back.

At the Coliseum, Team Raven begins gathering all humans into the church.Sun Hwa hides and Jin Ah refuses to follow Tong Joon, saying that all the trouble is because of her because Choi Yong Suk went to the gym to get her medicine.However, Tongjun catches her and takes her to church.Another group of humans is busy looking for Xu Yixiu.Cheol Jong discovers a room full of possessed humans and Cheol Jong escapes, but Seo Yi Soo is also possessed by him.Nam Sang-won watches these developments on closed-circuit television and orders Ji-sung to kill Jae-jin and Ja-eun to more efficiently lead him to Seo Yi-soo.

The doctor took out the reagent from Ziyan's body and explained that the special infected people (MHs) in the gym were made from the blood of Minami Aihara's original body.He was originally going to inject Sergeant Zhuo, but after learning that Xu Yixiu could infect humans, he changed his mind and swallowed the reagent himself.Disappointed, Sergeant Zhuo returns to his men and meets Ha Ni, who tells him about Sergeant Kim and Chan Young.In order to sneak the two in, Sergeant Zhuo distracted Minami Aihara and told him what happened to the doctor and the reagent.Minami Aihara learns that MHs are made from his body, becomes disturbed and destroys the communication center.After the mission was completed, Sergeant Zhuo went to see Sergeant Jin, and the two apologized to each other. Sergeant Jin persuaded him to persist until the end, and promised to use Sergeant Zhuo as the last line of defense when he turned into a monster.

Eunyou begins to have hallucinations and realizes that she is about to mutate.She thanks Eun-hyuk for coming back and begs Hyun-soo to remind her of her emotions after she becomes the new superhuman.Eun-hyuk and Hyun-soo move on, Eun-hyuk remains aloof, and Hyun-soo thinks he's lying and acting heartless.He promises to bring Eunhyuk back to Eunyou once he kills all the MHs in the gym.In the gymnasium, Dong Jun gathered the remaining humans, met Xu Yixiu's men and started to escape.Ye-seul and Jin-ok pursue Young-soo, but Seo Yi-soo stops them and catches Young-soo who has turned into a slime.She thought they would be disgusted, but Jin-ok hugged Young-soo in tears.Nam Sang-won appears and Jin-ok defends Seo Yi-soo and Young-soo in an attempt to gain sympathy.However, Nam Sang-won killed her in cold blood, telling Seo Yi-soo that this was her punishment for running away.The frightened Ye Seul ran away, and Seo Yi Soo ordered his men to attack Nam Sang Won.

Ji Sung told Jae Jin to run away because someone was going to attack him.Jae-jin says that Nam Sang-won will also kill Ji-sung when he is of no use, and destroys the generator in anger.The Crow Team takes advantage of the darkness and begins their escape plan, with Jae-Jin pretending to be a human to join them.Chanyoung left the team when he found Yeseul.She attempts to shoot herself among the infected, but he stops her.However, they got lost and met Ziyan.

No one stopped Nam Aihara and Ji Sung as they brought Lin and Seo Yixiu to the bonfire.The doctor keeps trying to shake hands with Seo Yi-soo, but Nam Sang-won takes the vial out of the doctor's stomach, breaks it, and pushes Lin into the fire.As Jae-jin expected, Nam Sang-won next killed Ji-sung who had completed his mission.The lonely Nam Sang-won walked into the fire and took over Seo Yi-soo's body.Eunhyuk and Hyunsu finally arrive at the abandoned gymnasium.They acted separately, and at this moment, Nam Sang-won, who had Seo Yi-soo's body, appeared in front of Hyun-soo.Hyun-soo asks about Seo Yi-kyung, and Nam Sang-won asks him to follow him.At the same time, the monster Yingxiu recognized Eunhyuk and helped him find Minami Xiangyuan.

As for the humans, they reached the last spot before the exit.Sergeant Kim gives Jin Ah the medicine and tells her that Choi Yong Suk will hold on until his last breath and that she should accept the kindness as well.The priest realized that Shanhua was missing and hurried back to find her.When Shan Hua prays for Yong Jun in the church, the infected Ji Chun appears.Before he can go any further, he begins to transform into a monster.The priest appears and knocks him down until Sun Hwa yells for Yong Jun to stop.Back at the exit, Sergeant Zhuo finally turns into a monster.He starts running towards the gym, but sees Jaejin behind Ha-ni.Sergeant Kim thought Sergeant Zhuo was going to attack her and pushed him away, just as Sergeant Zhuo exploded.The flashback shows that they agreed that Sergeant Zhuo would self-destruct when he turned into a monster, and take some of the monsters with him.At present, Sergeant Jin burst into tears and exploded in a clearing, and Sergeant Zhuo turned into a frozen frost monster.

Meanwhile, Nam Sang-won takes Hyun-soo to the campfire and laughs at him for constantly asking about Seo Yi-kyung.He ends up using his catchphrase - Long time no see, Cha Hyun-soo, and Hyun-soo realizes that Nam Sang-won has taken over Seo Yi-soo's body.Hyun-soo gets inside her, but Nam Sang-won attacks him mentally and then introduces herself.At that moment, Eun-hyuk arrives and stabs Seo Yi-soo in the body.The mental torture is interrupted when Hyun-soo stops him from killing Nam Sang-won because he believes he can save Seo Yi-soo.But Minami Aihara smiled and said he was not alone.Seo Yi-soo's men all arrive and attack.

Soo and Eunhyuk engage in a fierce battle with Seo Yixiu's men.Amidst this, Eun Hyuk kept trying to attack Seo Yi Soo, while Hyun Soo blocked every attempt.A flying monster attracts Hyun-soo's attention, and Eun-hyuk finally throws his stake at Seo Yi-soo.Just when Nam Sang-won was about to stop him, Seo Yi-soo took control of her body.The wooden stake hit her and Minami Aihara was forced out of her body.Hyun Soo moves Seo Yi Soo aside and Slime Young Soo comforts her.Seo Yi-soo apologizes for creating more monsters and asks Hyun-soo to kill Nam Sang-won for her.In a mood of revenge, Hyun-soo attacks Nam Sang-won who has taken over the burned body of Ji-sung.

Hyun Soo destroys the body and Nam Sang Won slips away again.Eunhyuk points out that they can't keep destroying bodies and offers to offer his body to Nam Aihara to kill him once and for all.While Hyun-soo and Eun-hyuk argue about who should be the victim, Nam Sang-won takes over Sang-wook's body again and recovers.Before Sang-wook takes over the body and starts crawling toward the bonfire, Hyun-soo realizes that the confusion in Nam Ai-won's hallucination about Yu-ri in season 2 is because Sang-wook was alive all along.Sang Yu did not allow Nam Sang Won to escape, and both of them were eventually burned to death.Unbeknownst to Hyun-soo, the dying Seo Yi-soo suddenly recovered.Lee Eun-you heads to the ruined Green Home, crying as she begins to turn into a monster.She hallucinates human Eun-hyuk, who hugs her.As for the real Lee Eun Hyuk, he left after Nam Sang Won's death.

Hyun Soo returns to the gym and tries his best to transform the monster into a human.They head to the construction site and everyone is reunited.Chanyoung suggests moving to a safer place, and Ha Ni asks about Eunyou's whereabouts.Hyun-soo suggests moving to a new human's home because Eun-you will likely go there if she evolves.Along the way, the gym survivors encounter a new group of humans.Many people are skeptical of them, but they decide to live together to best protect everyone from the threat of unevolved monsters.Infected people have the opportunity to become new humans, while Jin-ah and Ye-seul teach the new humans how to express themselves.We also see Seo Yi-soo, who has grown up rapidly, and Ying-soo, who has turned back into a human being.

Eun Hyuk tells Hyun Soo that if Eun Yoo comes back, it means that she has become a new human being and may be with other new humans.Hyun Soo promises that if he finds her first, he will restore her human identity and reunite the brother and sister.By the end of the episode, we see Eunhyuk acting more like a human.He finds Eun-yu, who has become a new human being, and calls Hyun-soo.Eunyou barely glanced at them and returned to walking on the roof, listening to music like in the first season.Eunhyuk and Hyunsu looked at her with smiles.