[ Anime XXX ] Maki chan to Nau Episode 4

It is based on the visual novel of the same name by Waffle. Sakonji Seiichi's next-door neighbour is Sanjou Maki, who is a young lady. She looks well-bred, and she appears to be endowed with both beauty and intellect. Seiichi, on the other hand, witnesses her masturbating on the balcony one night... Maki readily confesses that she is a nasty girl and playfully advises Seiichi that she should be coerced into being his sex slave.