Mesu Kyoushi: Injoku no Kyoushitsu
Genres: Hentai
Type: OVA, Episodes: 3
Aired: Jun 25, 2009 to May 21, 2010
Studio: Anime Antenna Iinkai
Source: Visual novel
Rating: Rx - Hentai
Synopsis:
Based on the adult game by Bishop.

Toudou Miyuki and Sanada Eiji are teachers in the same school and lovers. They had decided that they would preserve their chastity until they are married. However, Miyuki is assaulted and loses her virginity to Takuya, Eiji's step-brother. Furthermore, it doesn't stop there as Takuya turns his attention on the other female teachers one after the other.

(Source: hanime)