Eri, who had been happily married to her colleague and elementary school teacher Shinji and settled into family life. One day, Eri happened to run into her former senior teacher Kimura in the neighborhood. It turned out that after Eri left her job, Kimura was forced to retire due to bullying issues with parents and had to leave his teaching position. During their time as teachers, Kimura had been lively and full of energy, but now he looked nothing like his former self, which made Eri feel sorry for him. …And she did not know that this encounter was not by chance but part of Kimura's plan. Eventually, she would be pressured into a relationship with him, something she could not have imagined at the time.
