Ienai Koto The Animation
Genres: Hentai
Type: OVA, Episodes: 2
Aired: Mar 6, 2015 to Mar 4, 2016
Studio: Peak Hunt
Source: Manga
Rating: Rx - Hentai
Synopsis:
Hayakawa Rena as school advisor caught her sister, Hayakawa Mina having sex with guy teacher. But Rena is blackmailed into being a plaything for men.

(Source: AniDB)