A girl from my university class lives on the floor above me in the same apartment. We've only seen each other by sight and have never spoken to each other. Just when I thought we would never have any contact, she was kind to me when I was in trouble, and we got excited talking about manga and quickly became friends. But she has huge breasts, is a virgin who is curious about lewd things, and is obsessed with my dick! I never expected that, and in fact, this situation is like something straight out of a manga!