Hentai Manga like Tatta Hitori no Youheidan

Seiso Kanojo, Ochiru.

Also known as Good GF Gone Bad.

Status: Finished
Genres: Hentai

Even though it's against the school rules for students to date, Tsukimi and Takagi have been going steady in secret for a whole 6 months. On a date at the amusement park, they finally share their first kiss, only for it to be caught on camera by an interloper. When the would-be paparazzo threatens to show the faculty, Tsukimi, being the good girl she is, goes along with his demands in order to preserve her and her boyfriend's academic standing.

Toshoshitsu no Kanojo: Seiso na Kimi ga Ochiru made

Also known as Girl in the Library: The Corruption of a Pure Girl.

Status: Finished
Genres: Hentai

Yukiha Serizawa is a newly minted high school girl, who enjoys working as a library assistant with Aida, a boy she likes. But things are about to change for her...

One day the school janitor asks to see Yukiha, to thank her for helping him the previous day. She trustingly goes along with him. The next thing the pure Yukiha notices is that she's been given a drug that made her pass out, and the janitor had his way with her. She wakes up in the middle, and finds she loves the rough sex she's experiencing. Although she wanted to save her virginity for Aida, she finds she can't resist the allure of sex.

Koushinchou Volley-bu no Seiso-kei Kanojo ga Senpai no Mono ni Natte Shimau Ichibushijuu

Status: Finished
Genres: Hentai

Notes:
Published in Air Comiket 2
It has a live-action AV adaptation: NIMA-013 (2022/10/04)

Kateikyoushi no Geass

Status: Releasing
Genres: Hentai

Note: Published in Comiket 103