Karen
English name: Karen
Genres: Hentai
Type: OVA, Episodes: 1
Aired: Aug 18, 2002
Studio: Shinjukuza
Source: Manga
Rating: Rx - Hentai
Synopsis:
During the school soccer game, the cheering squad rebels against its captain, Ryo, and threatens to quit. To keep her squad together, Ryo accepts a challenge from her squad members. The first challenge is to keep cheering perfectly while having a sex toy inside her the whole time. 

However, the challenges keep getting worse. Ryo is sexually assaulted by the cheerleading squad. She is forced to agree to group sex with the rugby team. Will Ryo be able to complete the challenges? Will she be able to keep the team together, and remain the captain?