Nana to Kaoru

Kaoru is a 17-year-old virgin who has an S&M fetish. He has always dreamt about an SM relationship with his childhood friend Nana, who is looked upon as perfect and is always the target of boys' eyes. Their relationship has somewhat deteriorated through the years, due to them hanging out with different people and because Kaoru is not taking his education too seriously. One day though, Kaoru's mother gives some of his S&M toys to Nana for safekeeping - Nana finds the leather one-piece that Kaoru bought and tries it on but accidentally locks herself in it and doesn't have the key! Kaoru frees her of the one-piece, but then Nana realizes she may like Kaoru's hobby more than she thought and subsequently the two of them start engaging in so-called "breathers". These breathers are intended to relieve Nana of stress, stress originating from her attempts at keeping her grades and her name perfect.

Succubus Appli: Gakuen Saimin

Ordinary highschool boy Oda Yuma receives a smartphone app called "Hypnos" from a lustful succubus girl. The app can hypnotize women in an erotic way, and as soon as he gets it, Oda tries the app on his sassy gyaru classmate Fujimiya and the head of the school's disciplinary committee, Akizuki Sakuranoi, turning them both into obedient sex slaves!

Dropout

In a school foundation there are creating new ways of learning to improve student achievement. That is for those who get a small score and fail the exam will be in the Drop Out (DO) and made sex slaves for impingement lust. And for those who get high achievement will be served free sex in a special lesson.

Boku ni Harem SeFri ga Dekita Riyuu

Three gals are crazy about Nanashi, a gloomy guy in class! Nanashi, who has no immunity to girls, is tormented and aroused by the innocent and unconscious seduction of the gals! Then the three gals forcefully come to Nanashi's house... Nanashi is secretly teased along with the gals' dirty talk. Eventually, their conversation turns to sex... Nanashi explodes with excitement, saying, "I want to try it!" The gals attack him! His body and mind fall into the sexfriend experience that begins with a 4P! (Source: Lune-soft, translated)

Bible Black

Based on the erotic game by Active. Minase, a high school student, found a book of magic in an isolated room in his school. He started practicing black magic that has extreme sexual effects that benefited him and some of his friends. Intrigued, Minase got deeper and deeper into using the craft, not realizing the evils that will come forth. Eventually, the origins of the book was revealed, and so did the incident twelve years ago on the night of the Walpurgis, the night when the power of evil is at its strongest. After coming to his senses, Minase struggles to get himself out of the darkness that he had put himself into. (Source: Anime News Network)