Girl in the Library: The Corruption of a Pure Girl vol. 1 & 2 (18+ doujin)

Yukiha Serizawa in a newly minted student, 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 Masami Kitou 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.

The story continues in vol. 2, which is included in this doujinshi set, the janitor is blackmailing Yukiha… but it doesn’t matter, because she loves giving herself to him anywhere he asks. Poor Aida never had a chance…