Season 1

Everything was going well in both her love life and her career. That was until that day came. Miyata Aiko (Akita Shiori), who works at an apparel store, lost both her parents at a young age, but lived a happy life with her kind older sister Saeko (Takada Riho) and her childhood friend and boyfriend Yoshimura Yuma (Kageyama Takuya), a doctor. Then, just before her 25th birthday, Aiko is told by Yuma, "I have something important to tell you," and her heart starts beating fast, thinking, "Maybe he's going to propose to me?" However, one day, on her way home, someone pushes her from behind, causing her to fall down the stairs and fall unconscious! When she wakes up, she learns an unbelievable truth...

Aiko (Akita Shiori) is called to a hotel room by her ex-boyfriend, Yuma (Kageyama Takuya), who is now her sister Saeko's (Takada Riho) husband. For some reason, she meets Yuma's father, Masaki (Maruyama Tomoki) there, but suddenly loses consciousness. When she wakes up in bed in the morning, she finds Masaki sleeping half-naked next to her...! Aiko can't accept this reality, but later, while she is working at the apparel store where she works, Yuma's mother, Yuriko (Akama Mariko), appears and confronts her with a photo...! Furthermore, Aiko goes to see Masaki, who claims to know the person who pushed her down the stairs. But who is that culprit...? And what exactly are Yuma's true feelings...?!

It's been a month since Yuma (Kageyama Takuya) and Saeko (Takada Riho) suddenly disappeared. Now alone, Aiko (Akita Shiori) has been transferred to a new department. Meanwhile, a new part-timer, Makino Takatoshi (Ikeda Masashi), arrives at her workplace. Aiko feels as if someone is following her on her way home from work at night, so she asks Takatoshi to escort her. Aiko's heart slowly begins to open up to the kind and cheerful Takatoshi. Aiko tries to forget about Yuma and move on, but...

Aiko (Akita Shiori) has started dating Takatoshi (Ikeda Masashi). She tries to forget about Yuma (Kageyama Takuya) and focus on Takatoshi. But one day, when Aiko gets out of the bath, she finds over 100 missed calls from Takatoshi on her smartphone...! After that, Takatoshi's love for her becomes too intense, and his abnormal behavior and controlling behavior towards Aiko escalates! Then, in the midst of a certain incident, Aiko witnesses Saeko (Takada Riho) in an unbelievable state...

Aiko (Akita Shiori) , who witnessed the shocking state of her sister Saeko (Takada Riho) , is shocked to learn from Yuma (Kageyama Takuya) that Saeko and Takatoshi (Ikeda Masashi) were secretly connected and the truth behind Aiko's fall... Aiko cannot accept that her beloved sister Saeko, who she is close with, tried to kill her. Meanwhile, Saeko, who has lost Yuma, goes to see him after work and takes an outrageous action!? Meanwhile, Takatoshi arrives at Aiko's place as she is waiting for Yuma!

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