50 experienced people. Ayumi Natsukawa has completely changed from her school days when she was sexually uninhibited, and now that she has become a member of society, she is devoted to him. She is the boss of her company and her serious girlfriend has been with him for 7 years and they finally got married last year. She came on a trip to celebrate her first wedding anniversary and met her college classmate 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...