Flashback Game
Genres: Hentai
Type: OVA, Episodes: 3
Aired: Oct 18, 2001 to Apr 18, 2001
Studio: Blue Cat
Source: Unknown
Rating: Rx - Hentai
Synopsis:
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)