Saito, a student who is retaking entrance exams, is in love with Sumire, a married woman who lives next door. She cares about Saito, cooks him dinner, encourages him in his exams, and is also a beautiful woman with an amazing figure. There was no reason for him not to fall in love with Sumire. However, while he admires her husband, who lives a happy family with Sumire, he also feels conflicted about not falling in love with her. One day, during the day, Saito hears a scream coming from Sumire's house and rushes to help her.