New nurse Rino and Yurina begin working under female doctor Ayako. Initially just ordinary newcomers, the two gradually develop a lesbian relationship within Ayako's ward. Rino repeatedly makes mistakes and is threatened with termination, only to be violated by Ayako using a strapon. Yurina accidentally witnesses the act, rapidly deepening their connection. Yurina is then drugged into unconsciousness, restrained, and brought to climax repeatedly using Ayako's aphrodisiacs and sex toys, gradually descending into a sex slave. As time passes, the three engage in intense lesbian threesome sex—an impressive sight. The transformation of two previously straight women, trained by Ayako into lesbian lovers, is a story you must see.