50 experienced people. Ayumi Natsukawa has completely changed from her sexually uninhibited student days, and now that she has become a member of society, she is devoted to him. I dated my serious boyfriend, my boss at work, for 7 years and finally got married last year. On a trip to commemorate their first wedding anniversary, she meets a classmate from college at a local hot spring town. "I never wanted to meet these guys again..." They were Ayumi's fellow sluts. Ayumi vows not to fall for them no matter what, and has a strong will to never lose sight of herself, but her old memories gradually come back and she begins to fall...