Hitoriga The Animation
Genres: Hentai
Type: OVA, Episodes: 4
Aired: Jun 26, 2009 to Sep 22, 2010
Studio: Office Take Off, Cafe de Jeilhouse
Source: Manga
Rating: Rx - Hentai
Synopsis:
On the train to school one day, Shirakawa Sumire is molested. However, when she confides in teacher Takahashi, the nightmare escalates...

(Source: AniDB)