Everything was going well—love, work, life. Until that day arrived. Miyata Aiko works at an apparel store. Though she lost her parents young, she’s spent her days happily surrounded by her kind older sister, Saeko, and childhood friend Yoshimura Yuma, a doctor. Aiko is dating Yuma, but hasn’t had the courage to tell Saeko. As her 25th birthday approaches, Aiko wonders if Yuma might propose, but on her way home one day, someone pushes her down a flight of stairs. She loses consciousness, and when she wakes up… Yuma is married to Saeko. On top of that, Aiko loses a major career opportunity. From that moment on, she’s swept into a tragedy beyond anything she could have imagined. Behind it all, a certain person’s hidden motives begin to surface…
Shinichi debuted as a novelist at a young age, but his career has been stagnant for many years. He also has broken up with his girlfriend. His day have now become gloomy. At this time, Yuko and her son moves into Shinichi's home. Yuko is the ex-wife of Shinichi's friend. Shinichi lets them stay at his house. Shinichi writes his novel every night, while Yuko goes out at night to date men. She is conflicted with her feelings to act as a strong parent and to deal with her unspeakable loneliness. Yuko’s son, feeling the loss of his father's presence, begins to admire Shinichi. With their living arrangement, Shinichi and Yuko try keep their distance from each other. But one night..
