Onna Kyoushi Nijuusan-sai
Japanese title: 女教師 二十三歳
Type: OVA
Episodes: 2
Source: Visual novel
Genres: Hentai
Studios: Shura
Producers: Japan Home Video
Duration: 28 min per ep
Rating: Rx - Hentai

Honjou Rumiko is a school teacher caught in a web of blackmail and deceit.

(Source: AniDB)