Moving to a new apartment in Tokyo, I noticed my hot half-Japanese neighbor across the hall always left her curtains open—changing clothes, having sex with her boyfriend in full view. Peeping at her became an obsession. One day, she called out to me and invited me into her room. She asked me to help her practice sex, and before I could react, she pinned me down and transformed into an aggressive seductress. This shocking turn of events plunges the story into intense, forbidden depths.