When Tsukioka Natsu was in college, she dated her classmate Nagumo Suiki, but one day when he was applying for a job, Suiki suddenly broke up.Seven years later, Xia learned about Shui Ji's death from a friend in college.Xia, who had never seen each other after being broken up and had no real sense of the fact, went to the funeral, where he met a little girl named Hai. Xia couldn't hide his surprise when he learned that she was Shui Ji's daughter.Then, Shui Ji's mother told him that he was Hai's father.Shui Ji gave birth to a child in a place unknown to Xia and raised her without saying anything. Xia thought about the seven years Shui Ji and Hai spent...

Tsukioka Natsu, who works in a Tokyo printing company, has a lover, Momose Yayoi, who works in a cosmetics company.Although the two are ordinary, they live a happy life every day.One day, while discussing summer vacation arrangements in Xia Tian's apartment, a call came from Xia Tian's cell phone.Xia's expression was stiff when she answered the phone.

The next morning, Xia returned to her hometown.Regarding the sudden visit, their father Kazuya, mother Sachiko, and brother Yamato, who were having breakfast, were thinking about what would happen, but they sensed the cause of the matter from the summer atmosphere where they didn't say much.Xia Tian took out the mourning clothes in his room, and Kazuya handed him the black tie.

Xia came to the mourning hall and stopped in front of the signboard that read "Funeral Cemetery of the Late Nanyun Shui Jiyi“".My friend from college, Junki Mayama, asked ”how long has it been since they last met?%'s voice.Answered in the summer after 8 years.The dead Shui Ji was Xia's former lover when she was in college.

While Xia was in the incense-burning procession, greeting Shui Ji's mother Zhu Yin and father Xiang Ping and their relatives, his eyes stayed on the girl together.Xia was shocked to know that the girl was Shui Ji's child.

Xia walked into the funeral parlor hall, and the girl just now and Tsuno Haruaki walked out of the venue.Xia Tian chats with girls.The girl called herself Hai and told Xia that she was 6 years old.Summer, reminiscing about the memories of the water season...

Tsukioka Natsu learned from Suiji's mother, Zhu Yin, that Hai was his daughter at the funeral of her college sweetheart, Nagumo Suiji.In such a summer apartment, the sea suddenly came alone.Surprised Xia Tian, ​​Hai asked: “Xia Tian's father, when will we start? ” questions.Xia Tian couldn't answer that question very well.Xia felt that Hai had to go home no matter what, so she contacted Zhu Yin and asked her to pick Hai up.

Facing the sea rushing across the room, Xia felt at a loss. At this time, her lover Yayoi Momose called.Yayoi came to the apartment after a while and was a little surprised to see the sea, but she wanted to play with her before picking her up.Later, in the apartment after Akane brought Hai home, Yayoi asked about Natsu and Hai's relationship.In this regard, Xia frankly told him that Hai was his daughter, a fact that he only learned at Shui Ji's funeral.After hearing those words, Yayoi couldn't hide her shake, and Xia Tian replied that she wanted to think about the sea...

Tsukioka Natsu told her lover Momose Yayoi that she had a daughter.Moreover, when she broke up with Nagumo Suiji, although she did not know that she gave birth to Hai, he knew about the pregnancy and thought it was aborted and told her the truth.After hearing Natsu's words, Yayoi recalled her past.His past that he couldn't tell Xia Tian.Yayoi kept this memory in her heart and told Xia that if Xia wanted to be a father, becoming a mother herself was also an option.

Xia went to Nanyun's house and reunited with Hai there.When Xia Tian came to see me, Hai was so happy that he fell asleep exhausted from excitement.Akane says, I will be happy if you are by my side when Hai wakes up, and urges Xia Tian to have dinner.As Xia Tian helped prepare, Akane shared her thoughts on Mizuji.

Sachiko, the mother who received Natsu's call, told Kazuya and Yamato that Natsu had something to say to the whole family.The Tsukioka family became lively because of Yayoi's wedding announcement.

On the other hand, Natsu, who spent the holidays with the sea, brought Yayoi to Nagumo's house.Seeing Yayoi coming with her, Akane had complicated thoughts.Because of Hai's hope, the three came to the library where Shui Ji worked, and met Tsuno there.

Tsukioka Natsu was worried about Hai, who was still energetic after the death of her mother Nagumo Suiji, and told her "there is no need to pretend to be energetic" and let her vent her sadness.Overflowing with emotion, Hai tightly hugged Xia Tian and kept crying, and Xia hugged such a sea for the first time and cried quietly.Momose Yayoi could only look at these two people.

Come to the beach to play in summer and the sea.So Hai told Xia Tian that dad didn't have to do anything.“But don't disappear.”Hearing Dahai’s true words, Xia Tian replied: Although it cannot replace Shuiji, it can be soaked together“.Akane and Shohei looked at the two of them from a distance, missing their dead daughter, ”If Suiji was still alive...% said with tears.

After that, Summer went to Yayoi's apartment.So Xia told him that he decided to stay with Hai as much as possible.On the other hand, Yayoi approaches Xia Tian and wants to become the father of the sea.Yayoi wants Natsu to come to a conclusion, and Natsu feels restless.For Xia Tian who doesn't understand why she is anxious, Yayoi wants to tell her about her past...

Nagumo Akane heard from Tsukioka Natsu that he could get a week's summer vacation, so he proposed to stay at Nagumo's house for a week and live with the sea.Hai is very happy to know that Xia Tian will come here to spend the night. “ can stay here forever! ” and Xia Tian stick together.

Zhuyin said she wanted to greet Xia's parents.In fact, Xia, who hadn't told her family about Hai yet, hesitated.Zhu Yin sighed and urged Xia: “Speak quickly.”The quibbling Xia Tian and the nagging and preaching Zhu Yin.Looking at the two of them, Hai smiled like a mother.

In order to tell his family about Hai, he has to go back to his hometown in the summer.However, what greets Natsu is her mother Sachiko Tsukioka, her father Kazuya, and her younger brother Yamato, who mistook it for Yayoi's wedding report and got excited without permission.There were carefully prepared dishes on the table. In a completely festive atmosphere, Natsu told Yayoi that she had a daughter, and that she was not his and Yayoi's child...

Taking advantage of the summer vacation, Tsukioka Natsu spent a week with Kai, Akane, and Shohei at Nagumo's house.On the first morning, when I woke up, I saw the sea sleeping soundly in front of me, and Xia Tian jumped up with fear.“Get up!” Xianghei stuck his head out and thought about the Nanyun family.The sea finally woke up.

After breakfast, Xia Tian confidently asked me if I wanted to tie my hair. I said: “Yes! ”Hai said happily.Now is the summer to practice the three-strand braid of Momose Yayoi, but the sea“ braid is good!” is said.Summer is troubled by not knowing what to do.Akane chuckled as she mentioned that she only practiced braiding in the summer.

Afterwards, Xia Tian and Hai went to the apartment where Hai and Shui Ji once lived.Although the room had been checked out, the landlord still allowed me to enter the room under the arrangement.Looking at the narrow and unpleasant single room where two people live, I think of the lives lived by two people in summer, Shui Ji and Hai...

Natsuki Tsukioka and Kai go to Momose Yayoi's apartment together.After arriving, Xia hugged Hai who was standing by the sink from behind.Looking at the two people like that, Yayoi smiled.

Yayoi took out the prepared croquettes from the refrigerator and started making them.Seeing that, Hai asked: “Can croquettes be made at home? ” said in surprise.When Shui Ji, the mother of the sea, was alive, it was said that she would only buy croquettes as a side dish in the supermarket when they were cheap.After hearing that story, Xia Tian thought about the past water season and the life of Dahai, and told Daida that making croquettes at home was very hard.

After eating Yayoi's croquettes, they tasted as good as in the supermarket! “ said gratefully.Afterwards, Yayoi, who was alone with Ui and Natsu, asked Ui and Natsu how their lives were.I replied that I was very happy at the beach, and then apologized and said: ”I'm sorry I took Xiaoxia all by herself.% Yayoi said half-jokingly that sometimes he would not go to see the person he liked. He asked Hai if Shui Ji was like that too.Then, Hai asked why Xia Tian and Shui Ji separated, and Yayoi was speechless for a moment.Hai also asked Yayoi Mizuuki and Tsuno Kiyoaki if they didn’t date because they had him.

At that time, the Nanyun family was discussing the forty-nine-day rituals of Shuiji and the matter of laying bones.Akane called Tsuno.Zhu Yin said that she would come to see Shui Ji after she calmed down, but Tsuno was speechless for a moment...

After spending a week at Nagumo's house, Natsuki Tsukioka (Ren Meguro) left with a farewell from Akane (Shinobu Otake), Shohei (Go Rishige) and Umi (Sena Izumiya).After walking for a while, Xia looked back and saw Hai chasing him and waving goodbye.The two smiled and waved to each other.On the way home, Xia went to Nitta Yoshihiko's (Yamazaki Shunori) photography store to pick up photos, and at the same time took two new films to develop.Nitta was surprised that Xia had new films so quickly, and Xia vaguely replied that it was because he had just returned from a trip.After returning home, Xia lay on the bed and looked at the photos.Seeing Haixin's smiling face, Xia felt relieved, but gradually, her longing became stronger.

The next day, Xia called someone during a break at work.After the call was connected, the other party made no sound.“Sorry to bother you, I asked your mother for your contact information. ”The other party responded: “Is it Xia?”After confirmation, the other party continued in a calm voice: “Oh, are you okay?”

In the evening, Natsu went to the supermarket with Momose Yayoi (Kasumi Arimura).Yayoi was very happy to hear Xia say "I'm cooking today", but soon realized that Xia wanted to cook because she missed Hai.Natsu always mentions the sea, which makes Yayoi feel complicated.The next day, Zhu Yin combed Hai's hair.Zhu Yin muttered: “Why should Lian Hai be brought along?”Xiangping replied: “Probably because of nervousness.”

Xia brought Hai into the coffee shop.Looking back, I saw a man looking for someone.Natsume met the male's gaze.“Oh, you're here, ”the male said as he came closer.That man is Natsu's biological father - Mizoe Motoharu (Tetsuji Tanaka)...

Natsuki Tsukioka (Ren Meguro), Yayoi Momose (Kasumi Arimura), and Minami Unkai (Sena Izumiya) went to the shopping mall together.Hai took Yayoi's hand and said excitedly: “Let's go!”Although Yayoi was smiling and behaving cheerfully, Tsukioka Natsu felt something strange in Yayoi's expression.

In the children's clothing store, Yayoi and Natsuki Tsukioka choose clothes for Umi.When Hai entered the fitting room alone, the clerk said to Yayoi: “Please come in with your mother.” Yayoi didn't know how to answer for a moment and was stunned.

Hai smiled and said to Yayoi: “ Yayoi looks just like her mother.”Yayoi asked Hai: “If I really became a mother, would you be happy?”Hai Yuanqi replied: “Yeah!”On the way back to Nagumo's house, Natsu asked Yayoi what her plans were for the relationship between the three of them.Facing the vague Yayoi, Natsu said that Yayoi seemed to be in pain when the three of them were together.Yayoi tried to fool around with a perfunctory smile.However, Xia asked Yayoi directly: “Do you want to break up?”'s opening statement….

Natsuki Tsukioka (Ren Meguro) broke up with Yayoi Momose (Kasumi Arimura), whom she had been dating for more than three years, and decided to live with her daughter Minami Unkai (Sena Izumiya).In the evening, Tsukioka Natsu used the computer to search for information related to “Single Parenting”, picked up a pen and took notes, and saw the name column in the notebook.When writing “Nayun”, he stopped.He thought about what he should do next.

Tsukioka Natsu went to an izakaya with Fujii (Ayumi Nakajima), a senior in the company, and told him that he had a daughter and decided to live with her alone.Fujii shared his very hard experience of coaxing the children to eat and sleep while his wife was hospitalized.Natsuki Tsukioka said that she had made up her mind and even considered changing her job in order to prevent Hai from transferring to another school.But Fujii told him:“ If parents collapse due to stress, it will be a secondary injury to the children.”

Tsukioka Natsu went to Odawara's elementary school to pick up Kai.As the two walked, they talked about the life of Hai's mother, Sui Ji (Furukawa Kotone).Tsukioka Natsumi asked: “...What do you think about transferring to another school?”Hai immediately replied: “No.”“Mom is gone, many things have changed in Hai?But must the sea change?Why?”Faced with Hai's question, Tsukioka Natsu was speechless...

Natsuki Tsukioka (Ren Meguro) is tidying up the rooms in her apartment in order to live with her daughter Minami Unkai (Sena Izumiya).Yamato, the younger brother who came to help, said to Xia: If you have any difficulties, just call me.“Xia said:”Two people work hard together.“Yamato felt uneasy about this sentence.

On the other hand, a farewell party for Umi was held in the elementary school class, and Umi was bid farewell by class teacher Nogi Natsumi (Kajun Tani) and her classmates with applause.When returning home, Umi, who was with Natsumi and the two, asked her former mother, Mizusuki (Furukawa Kotone), what she had said to her.So Natsumi told Hai”you always say Xiaohai is the most important“, and Hai smiled slightly.

Every day, Hai, Akane (Otake Shinobu), and Shohei (Ri Shigegang) come to Summer Apartment.”Excuse me!“Xiang Ping said to Dahai:”I will be back from today.%Xiangping and Zhuyin hugged Dahai tightly, reluctant to say goodbye to Dahai.Seeing that look, Mr. Xia felt a sense of guilt...

Tsukioka Natsu (played by Ren Meguro) woke up not in bed, but in a quilt spread on the floor.Umi (Sena Izumiya)'s schoolbag and stuffed animals came into view, but there was no sign of Umi.“…Xiaohai.”I called out, but there was no response. There was silence in the room.

At this time, Kai who woke up at Nagumo's house just woke up and came to the living room, calling “Natsu-kun...”, but there were only Akane (Otake Shinobi) and Shohei (Rishige Tsuyoshi) there, and Natsu was not there.Zhu Yin said:“ Didn't you say you wouldn't go back?” Hai was speechless.

Akane and Shohei said to Hai, who was lying on the bed in pajamas, "Let's have breakfast."“ Danhai said:” I don’t want to eat it.“Zhu Yin was holding the rice ball in the kitchen, handed it to Dahai and said: ”I can't do it without eating, because I have to survive.%Then, he talked about eating rice balls on the day Shui Ji died.

Soon, Xia's mobile phone received a call from Yayoi (Kasumi Arimura).Natsu answered the phone and Yayoi told Natsu Hai that she had something to tell him….

Summer 2021.Nagumo Suiji (Furukawa Kotone) and 4-year-old Hai (Izumiya Tsukina) live in a small apartment.Television news programs have been covering the Tokyo Olympics for days.In the morning, Mizuuki, who works as a librarian, discovered Tsuno Seimei (Sosuke Ikematsu) in the parking lot near the entrance of the library.In order to keep up with the time, Shui Ji deliberately untied the laces of his sneakers, squatted on the spot and tied them again.Tsuno noticed Mizuki's presence and called out “morning”, and the two walked into the library together.

During the lunch break, Suiji was resting alone in the lounge, and Tsuno came to him.“...Nanyun, ”he called out, “is there anywhere you want to go? ”he continued.So Mizuno was surprised by Tsuno's proposal for the two of them to go out together, but he confessed: “I don't want to like Mr. Tsuno.”.