A student, as fragile as a puppy, seduced me, her homeroom teacher, to a love hotel. Actually, she was incredibly promiscuous, and my rationality completely crumbled. (Mita Marin, SONE-709)

Marin, a beautiful girl in a school uniform, dreams of becoming an architect. After overhearing her dream, teacher Oki decides to take her to a designer hotel along her way to school to satisfy her curiosity. Marin enthusiastically tours the hotel, but her actions unconsciously reveal her underwear and breasts, seemingly tempting men. Seeing this, Oki, fearing for his social standing, still crosses the line. Tormented by guilt, Oki is further aroused by Marin's words, "I want to know more about the world I don't know," and their bodies intertwine once more.