Based mostly on the visible novel by Waffle.

Sanjou Maki is the lady dwelling subsequent door to Sakonji Seiichi. She seems to be well-bred, gifted with each magnificence and brains. Nevertheless, one night time, Seiichi sees her masturbating on the veranda…

Maki simply admits that she’s a unclean lady and jokingly suggests to Seiichi that she ought to be blackmailed into being his sex-slave.