Flashback Game
Japanese title: フラッシュバックゲーム
Alternative titles: Flash Back Game, Flashback
Type: OVA
Source: Original
Episodes: 3
Status: Finished Airing
Aired: Oct 18, 2001 to Apr 18, 2001
Duration: 28 min per ep
Rating: Rx - Hentai
Studios: Blue Cat
Producers: Five Ways
Licensors: NuTech Digital
Genres: Hentai

Mizuho, Noriko and Yuri are three friends that go to a beauty spa that Yuri won in a competition. They relax there and have fun until they try one of the new treatments, where they see un a shining light. This light bring back their traumatic memories such as rapes of squads and sexual abuse in childhood. 

(Source: ANN)