It tells the story of a complicated struggle between Natori Keiko, a housewife who is ordinary but longs for ordinary happiness despite being beautiful, and Aihara Shiho, a sister who takes Keiko's misfortune as her greatest pleasure.

Housewife Natori Keiko (Yoshitani Ayako) has been married to her husband Shinichi (Seto Toshiki), an elite bank employee, for one year and leads an enviable and happy married life.

A serious and gentle husband, a good friend who can discuss everything, her parents who always warm her with affection, and most importantly, a sister Shiho (Rina Asakawa) who is always praying for her happiness.With the irreplaceable support of her family and friends, Keiko's life is going smoothly...

Of course, that's just what she thought.

It was obviously the first wedding anniversary, but Shinichi went to work indifferently. Keiko watched him leave, thinking: Could it be that the anniversary was forgotten?“

Keiko feels uneasy. Her friend Yuka (played by Murase Sae) said that many people will have a divorce crisis in the first year of marriage. Could it be that Shinichi cheated after just one year?Although Keiko was scared, she baked her signature apple pie and waited for him to come back...

However, this is just the beginning of the heroic battle that is about to begin!!

My happiness is to see your unfortunate appearance...The battle full of jealousy and desire begins!!

Natori Keiko (Yoshitani Ayako) originally lived a happy married life as a stay-at-home housewife. One night, she accidentally looked at her husband Shinichi's (Seto Toshiki) cell phone and began to suspect that he was having an affair with her friend Yuka (Murase Sae)..But in fact, Shinichi's affair partner was not Yuka.That night, the person who had repeated trysts with Shinichi was Shiho (Rina Asakawa), Keiko's sister whom Keiko completely trusted unconditionally.

“My happiness is to see my sister in misfortune”——.Shiho has been disgusted with the top student Keiko since he was a child.She wanted to destroy her sister's perfect smile, and because of this, she took away all the important things from Keiko.However, only Shinichi is the one she seriously likes...

I haven't done anything yet, and I watched the marriage between Shinichi and Keiko just to push Keiko down from the peak of happiness...!

Keiko had no idea about this and completely believed in her sister Shiho's fabrication of an unfaithful relationship between Shinichi and Yuka. She believed it to be true and questioned the innocent Yuka...

Then as Shiho expected, Keiko lost her most important friend——!

In order to see the hurt look of the sister I hate the most... I fell from the peak of happiness! The poisonous fangs of the sister who went off the rails attacked Keiko!!

Keiko (Yoshitani Ayako) begins to suspect that her husband Shinichi (Seto Toshiki) is having an affair, but she has not yet realized that the affair partner is actually her sister Shiho (Asakawa Rina). When questioning her friend Yuka (Muraze Sae)The two quarreled.Keiko was heartbroken because she lost an important friend, and next to her, Shiho, the culprit, snickered... "Sister, you are always more unfortunate than me"——.

Wanting to see her sister's unfortunate face again... When Shiho's twisted feelings intensified, Keiko's unexpected luck came to her.She was pregnant with Shinichi's child.Keiko couldn't restrain her joy and immediately reported to Shiho.“Actually...I have a child.” Keiko put her hands on her belly and looked happy.Seeing Keiko's appearance, Shiho was so angry that his teeth itched.

I planned to push my sister from the peak of happiness to the bottom, but I didn't expect that I would also be pushed to the bottom... Anxious Shiho called Shinichi to the hotel, wanting to confirm his love for him, but it was over%... ShinichiBecause she had a child, she changed her mind and broke up with Shiho.

Keiko was finally satisfied in her heart...but that was only temporary. Wanting to destroy her sister's happiness, her sister stretched out her magic hand, causing tragedy...!!

Keiko (Yoshitani Ayako) was at the peak of happiness when she learned that she was pregnant, but unfortunately she fell down the stairs while shopping with her sister Shiho (Asakawa Rina).

“Shinichi, I'm sorry, the baby...” Keiko, who was sent to the hospital, told Shinichi (Seto Toshiki) who came over that she had a miscarriage...

“It’s great that Keiko is okay”Xinyi held back tears.

“It's all my fault...”Shiho kept crying.Jingzi felt sorry for her sister's tears and comforted her by saying it was no one's fault... stop crying.From her sister's tears, Keiko, who was heartbroken, comforted Shiho and said: "It was just an accident, you are not wrong... don't cry anymore".——Yes, it was just an accident, not anyone's fault... Outside the ward, Shiho's tears suddenly disappeared... “Thanks to you, sister, you are more unfortunate than me, thank you”——.

After being discharged from the hospital, Keiko pretended to be strong and optimistic.Yuka (Sae Murase) comes to visit after quarreling with Shinichi.Yuka heard what happened from Shinichi and became restless.“Keiko, you can cry if you want”... In front of friends who can share her sorrow, Keiko finally burst into tears... Looking at Keiko's appearance, Yuka clearly cleared up the misunderstanding and said“ I definitely did not cheat on Shinichi.”,“But, I feel something is wrong”——.

“Sister, I...Xinyi and I fell in love”——.

Keiko (Ayako Yoshitani), who knew nothing, was shocked when she heard her sister Shiho (Rina Asakawa)'s shocking confession.“Shiho, are you kidding...?”.Jingzi seemed to be pushed into the abyss in an instant.Looking at the crying Keiko, Shiho laughed wildly with pride (in his mind)... I just want to see your expression... be more desperate... cry a little more... become even more unfortunate!

“Kingko, that's not the case, listen to my explanation”.Shinichi (Seto Toshiki) tried his best to explain, but Keiko couldn't listen to anything... Frustrated Keiko returned to her parents' home, feeling sad alone.No matter how many times Xinyi came, Jingzi refused to see him and drove him away ruthlessly.

She had no intention of forgiving him, but at the same time she didn't have the courage to file for divorce.She felt that she was powerless... Faced with such a scene, her friend Yuka (Muraze Sae) told her: Nobuichi really wants to live a good life with you.“It's not okay for you to be silent and patient like this.Say whatever you think out loud”.Encouraged by Yuxiang, Keiko decided to face Shinichi in order to seize happiness again.However, just when Keiko made up her mind, Shiho launched an even more vicious attack on her!

At home, Keiko's parents were present, and her sister Shiho (Rina Asakawa) suddenly said something surprising: I have a baby in my belly, and it's Shinichi's child.“... Keiko (Yoshitani Ayako) was so shocked that she couldn't speak. Her father Tsuyoshi (Jimbo Goshi) beat Shinichi (Seto Toshiki) trembling with anger.

”How dare you do this to my daughter...“.Her mother Noriko (Riko Yamashita) was in tears, and Shiho stepped forward to stop her father... Seeing the important family members falling apart, Keiko finally made a decision and said to Shinichi: ”I want to divorce you.%......

A month later, Keiko and Shinichi separated, adjusted their mood, moved into a small apartment and began to live alone.Although I don’t know when I can forgive Shinichi, but thinking about it calmly, maybe I was wrong for not noticing Shiho’s feelings for Shinichi.While the kind-hearted Keiko was thinking about these things, a new encounter came——

Keiko plans to start again.However, at this moment, Shiho stood in front of Keiko again, and Keiko finally knew Shiho's true face!The sister who always supported him with a cute smile turned out to be a false smile just to make him miserable... The sister who knew her true face finally started to fight back!!

After the divorce, Keiko (Yoshitani Ayako) changed her appearance and started a new life in a small apartment. At the same time, the wedding banquet of her sister Shiho (Asakawa Rina) and her ex-husband Shinichi (Seto Toshiki) is about to be held.Neither Keiko nor her parents attended the wedding. Shiho was pregnant with the child, looking happy.She smiled triumphantly, as if she had won: “Sister must be in her moldy room now, eating shabby food.”At this moment, the lights at the venue suddenly went out, and the emcee's voice sounded: “Now, let us welcome the surprise guests.”

Shiho and Nobu, who had no idea, looked at each other in confusion.In front of their eyes, the entrance door slowly opened. Standing there was Jingzi wearing a bright red dress and exquisite makeup!

“elder sister!” Shiho was stunned, Shinichi also held his breath, and the guests were in an uproar.Under the gaze of everyone, Jingzi smiled calmly and said: “You two, I wish you a happy wedding.”The guest seats burst into warm applause and cheers...

However, Keiko’s purpose was not to congratulate!Finally, it's time to fight back... Keiko is about to pull Shiho down from the peak of happiness!

It has been a year since Ayako (Yoshitani Ayako) ruined the wedding... The marriage life of younger sisters Shiho (Asakawa Rina) and Shinichi (Seto Toshiki) has cracked early.After giving birth to a child, Shiho was troubled by the child's crying almost every night. He became bored with housework and childcare, and his home became a mess.Because she has a child, she can't go to the beauty salon. Nobuichi sighed and said: "If it were Cai Zi, she would do it perfectly."“Shiho can't feel happiness at all...

An angry Shiho becomes increasingly resentful of Ayako - it's all her sister's fault.

On the other hand, although Ayako was proposed to by her new boyfriend Kataoka Haruki (Miura Takahiro), she was not happy.If she becomes happy, Shiho will definitely come back to destroy her... Sure enough, Shiho, pushing a stroller, appears in front of Ayako pretending to be by chance...!

Although she was anxious about the reunion with Shiho, when she saw the child in the stroller, Caiko couldn't help but smile and said: ” looks exactly like Shiho when she was a child.%Although a lot has happened, it’s time to move on... I must also become happy - Ayako made up her mind and accepted Haruki’s proposal... However, at this time, Shiho came up with a plan to destroy Ayako.Way to happiness!The happiness that I finally captured will be destroyed again because of my sister's trap...!

I did not molest her, she is your sister...".

Keiko (Yoshitani Ayako)'s fiancé Haruki (Miura Takahiro) was arrested on suspicion of sexual harassment in the train.It was her sister Shiho (Rina Asakawa) who made the accusation... Of course, this was fabricated to destroy Keiko's happiness.

Keiko rushed to the station after receiving the notice, and was asked by Shiho to apologize:“ If you apologize seriously here now, I won't call the police.”.“As long as he apologizes... he will be let go, right?”.Although Keiko was trembling from the unprecedented humiliation, in order to save Haruki, she still knelt down in front of Shiho and apologized - “I'm sorry”.

“It's all my fault, it's my sister who...”.Keiko felt heartbroken about being implicated in Chunxi, and broke up with Chunxi who was released.“As for the marriage, just pretend it never happened”.So Chunxi accepted the breakup frankly: "I don't have the confidence to get along well with you sisters anymore".Shiho smiled mockingly after hearing this, and then in order to further attack the two, he spread a video of Keiko kneeling down to apologize.Therefore, both Keiko and Haruki were fired from the company, and their cohabitation and engagement were cancelled... Keiko, who seemed to have suffered failure, has not given up “happiness” yet!You have to seize your own happiness... My sister's heroic revenge plan has begun!!

“I'm waiting for you, Shiho.Three years after she broke off her engagement with Haruki (Takahiro Miura), Keiko (Ayako Yoshitani), who works in a restaurant in the suburbs, has her sister Shiho (Rina Asakawa) appear in front of her.Shiho, who became the wife of the president of the large conglomerate Muto Group and lived a celebrity life, heard that Keiko was working in a restaurant run by her husband and came to disturb her.Shiho looked down upon Keiko and said: "You are in your 30s and still doing odd jobs? How pitiful."” Jingzi said decisively: “Don't come to this store again.”However, Jingzi has been looking forward to this day.Keiko attempts to take revenge on Shiho with the help of her friend Yuka (played by Murase Sae)...

Shiho, who was unaware of this, asked her husband to promote Keiko to a full-time employee in order to push Keiko down from the peak of happiness again.The menu designed by Keiko was well received, and the restaurant received many invitations for interviews from the media.“My sister looked very happy”——Shiho took advantage of the position of the boss's wife and broke into the restaurant after closing, and began to behave like no one else in front of Keiko...

Shiho's minions who are persistently pursuing...The fate Keiko is waiting for!? The sister who wants happiness VS the sister who wants to destroy happiness! The battle finally enters the last chapter!!

“It will open tomorrow.So don't come to the store.This is the final warning.”

Keiko (Ayako Yoshitani), who was promoted to restaurant manager, warned her sister Shiho (Rina Asakawa) not to disturb her before the store reopened.

But the next day, just as Keiko expected, Shiho came to the store in order to destroy his sister's happiness.“ It took a lot of effort to congratulate you, you should be happy.”Shiho handed Keiko the congratulatory bouquet, and Keiko couldn't help but smile.Shiho looked surprised.“It's a pity, isn't it opening today? ”In order not to be disturbed by Shiho, Keiko told him the lie about the opening day! Keiko said coldly to Shiho who ignored the warning.“I planned to end it if you didn't come, this was a final warning, but it was too late.Having an affair with her sister's lover and husband, shaping her sister's fiancé into a pervert and a murderer, and the harassment she's been subjected to Keiko until now... Let's make everything public and knock Shiho down from the pinnacle of happiness!!

"Shiho, you must be ” more unlucky than me - my sister's merciless counterattack! Is revenge the result of happiness or -.The sisters’ mount battle is finally over! The final round of impact!!