Aika Ito, is 27 years old. She and Shinya, a high school classmate, got married after 10 years of dating and soon ended up pregnant. Though things were smooth sailing, Shinya was assigned to work abroad, forcing the two to live in separate countries. After giving birth, Aika visits Shinya for the first time, but when she meets him again, she's met with a cold attitude. Aika is perplexed by the sudden change in her husband. It was in that moment that her husband's colleague, 22-year-old Mona, a local woman, comes to visit...
Asuka had always dreamed of a romantic proposal, but when the time came, all she got from her live-in boyfriend of seven years, Yuta, was a casual "How about we get married?" over dinner at their local bar. He didn't even put down his phone or look her in the eyes! She goes off on him (in her mind) but then reminds herself to be realistic and accepts his proposal. As the wedding approaches, she finds an open box of condoms while cleaning one day... and notices that only one is left, even though she can't remember using any of them with Yuta. That's all the proof she needs: the bastard is cheating on her!!
Mami is in the seventh year of her marriage with Haruki, and three years ago, she gave birth to their son Harunosuke. She thought they had a happy future ahead of them. But boy was she wrong..! Present day. She's fed up with her husband's lack of manners at home. Cutting the cheese during meals, walking around their home naked, you name it! She's worried about him being a bad influence on their son, not that he cares. In fact, her nagging only brings him stress. One day, when doing the laundry, something falls from Haruki's pants' pocket... A love hotel membership card, with recent dates written on it, no less...! Haruki better watch out, because Mami is out for revenge!
Saki Sugita (26) is a hardworking woman with no friends and no boyfriend. She is doing well at work, but she is very awkward in her private life. She is in love with Nishimoto, her boss at work, but he's married. Just when she was about to give up, Nishimoto confides in her that he's divorced...? The relationship is gradually deepening, and perhaps marriage is on the horizon! Saki is at the peak of her happiness, but she gradually learns of Nishimoto's true nature hidden behind the happiness, through the social media account of Nishimoto's wife, with whom he is supposed to be divorced...!
Ai Suzuki was a failure at work, a burden on the company, and had no friends... the only person who loved her was her boss, Tatsuro. To society, their relationship was an immoral affair, but to her, it was true love. One day, driven by loneliness, Ai goes to see Tatsuro, only to find another woman with him. It turns out Tatsuro had other mistresses! After being stabbed by the other mistress, Ai wakes up in a parallel world, reborn as a successful, confident, and highly capable version of herself...?!
Ryo, my husband of six months, has become distant lately. Every time I speak to him, he seems irritated and responds with sharp words. Our strained relationship has taken a significant mental toll on me, but thankfully, I can lean on my best friend Miku. She's someone truly precious whom I trust and can confide in about anything. One day,I decide to surprise Miku with a visit, only to find my husband's car parked outside her apartment. He'd told me he was heading out for golf with his boss early that morning, but it turns out he was lying. The truth? He's been sleeping with my best friend behind my back! And as if that weren't enough,he showers her with affection he never shows me while also trash-talking me. As I grapple with my disbelief, a dark resolve forms within me, urging me to get rid of both my husband and best friend.