Mesu Kyoushi 4: Kegasareta Kyoudan
Japanese title: 牝教師4 ~穢された教壇~
Type: OVA
Source: Visual novel
Episodes: 6
Status: Finished Airing
Aired: Oct 30, 2015 to Sep 25, 2020
Duration: 21 min per ep
Rating: Rx - Hentai
Studios: PoRO
Genres: Hentai

Based on the erotic game by Bishop.