A nurse named I Cup has always been interested in caregiving since her student days, eventually landing a job at a nursing home. She dated one of the facility's managers but realized he had a sadistic side and enjoyed dominating her during their sexual encounters. As she became more aware of her masochistic tendencies, she found herself completely under his control. However, they eventually broke up due to unforeseen circumstances, leaving her reminiscing about their intimate moments and resorting to self-pleasure when memories surface.

（1）介護士 Iカップ。学生時代から介護に興味を持ち、介護施設に就職。施設のケアマネージャーと付き合ったが、その男性がSっ気があり、調教的なセックス憶えて自身がマゾである事を自覚して虜となる。しかし、訳あって別れる事になり、行為を思い出しては自慰にふける。