Bitter Virgin (Japanese: ビター バージン, Hepburn: Bitā Bājin) is a seinen manga presented by Kei Kusunoki and serialized in Young Gangan.

Daisuke is put off by her "sweet virgin" act and is annoyed by her extreme reactions to physical contact with men.

Working after school one day, Daisuke takes refuge in an empty church building to avoid a pair of girls, hiding inside a confessional booth.

She was told that the pregnancy may make her incapable of bearing children again, but since the doctors felt an abortion at that point would be dangerous, she carried the baby to term and her mother had it put up for adoption immediately after birth.

[3][4][5] Manga Sanctuary describes Kei Kusunoki's first love story as masterful stroke, Bitter Virgin being a deeply moving title covering dire subjects.

It also praises how the author delivers the heroine's secrets without stylistic excess and the acuteness in the depiction of Daisuke's reaction and behavior.

[6] Nicolas Penedo feels that the first volume does not focus on misery and writes with intelligence about the emotional turmoil of Daisuke, describing it as having a shoujo atmosphere, but that it will be enjoyed by both sexes.