Akira Iwamatsu

Saki Omura (Nonoka Ishikawa) is a college student who lives a seemingly peaceful life with her family. Still, behind her smiles, she is tormented by a sense of rejection and isolation. One day, she meets Rena and is fascinated by her appearance. She wishes to become thin and beautiful like Rena and be loved by everyone, but the relationship between Saki and Rena deteriorates. Social rejection and humiliation spiral her into bulimia nervosa until her thoughts are clouded by anguish. The turn of events takes Saki to a health house. During this mountain retreat, a few women with similar issues are separated from external human contact and become a part of a grotesque social experiment.

Kirihara's life was full of lies and loneliness. He was a picture book writer with a brilliant past that his first book hit a bestseller, but one day allegations of plagiarism of his first book emerged. The truth of the case was about to be revealed by a reporter who relentlessly chased after him. Around that time, he reunited with his mother, who had abandoned himself at an early age, but she was hospitalized unconscious. Despaired by his life, Kirihara jumps off the roof of the building and tries to commit suicide without improving his divorced relationship with his wife and son. A girl appears there to help him. The moment he thought "Who?!", Kirihara became the girl! Kirihara, who became the girl, witnesses him falling. Immediately after that, something even more mysterious happens. The time was back five days ago. This is how the mysterious five days of "Two Kirihara", a girl and a picture book writer, begins...