Stringendo: Angel-tachi no Private Lesson
English name: Stringendo
Genres: Hentai
Type: OVA, Episodes: 12
Aired: Jan 27, 2006 to Apr 27, 2012
Studio: Flavors Soft, Maboroshi Koubou
Source: Manga
Rating: Rx - Hentai
Synopsis:
Story about how each popular girls in high school ended up having sex with some of the less popular guys. Each of them have their own temptation for desire and lust which they could not control - that is Sex.

(Source: ANN)