Kyouhaku: Owaranai Ashita
English title: The Blackmail: Tomorrow Never Ends
Japanese title: 脅迫～終わらない明日～
Type: OVA
Source: Visual novel
Episodes: 3
Status: Finished Airing
Aired: Jan 14, 2000 to Jun 23, 2000
Duration: 28 min per ep
Rating: Rx - Hentai
Studios: Production D.M.H
Producers: Pink Pineapple
Licensors: NuTech Digital
Genres: Hentai

Yumiko is a school girl wanting revenge for her best friend recording her being gang-raped. So now she aims to rape every single friend her former best friend ever had.

(Source: ANN)