A sudden letter from my mother informed me that my father had to be hospitalized for cancer screening, but it coincided with my mother's travel schedule, so I decided to return to my parents' house for only three days. - It's been a year since I got married, and I haven't slept apart from my husband yet. - At the height of my happiness, I completely forgot about the abominable events of the past and went to my parents' house. - So an old classmate happened to find Sumire on her way home from shopping and followed her home. - Sumire-chan has a past that she can't talk about, and her classmates press for an affair, taking advantage of such a past...