Description:

Tatsuhiko Kido, a vocational/technical school student who's staying in his school's dorms, one day discovers a hole in the wall of his apartment room. He peeks through the hole, but when he does so, he sees his neighbor, Ikuno Emiru, masturbating and he's caught peeking! However, when he goes over to inform her of the hole in the wall, she shuts the door in his face. Luckily for him, he's able to stop the door from closing and pursues after her, but, in his haste, he trips and lands right on top of her. As luck would have it, she takes a picture of them in a compromising position and tries to blackmail him into getting naked?! (Source: MangaHelpers)

Description:

Youichi is a very serious, stoic young man with a girlfriend and a regular sex life. However, he has never experienced sexual self-gratification. Recently, he's become aware of a book called "Masturbation" at the library he works at -- an educated discourse into the history of the sin of Onan and related practices. Finding himself increasingly intrigued by the concepts within, he begins to conduct a series of experiments ... Join him as he embarks into a whole new world! (Source: Mangaupdates)

Description:

Izumi, a young art student goes to visit her old professor who is living out in the country. Izumi is trying to get away from something and wants to take a break at the professor's house for a while. When she stumbles on Sensei's secret sexual fetish, it sets off a tense relationship full of awkward moments and weird demands. (Source: MangaHelpers)