Haramasete Seiryuu-kun!
Genres: Comedy, Hentai
Type: OVA, Episodes: 2
Aired: Jun 24, 2011 to Jan 31, 2012
Studio: Horannabi
Source: Visual novel
Rating: Rx - Hentai
Synopsis:
It seems that everyone is fighting over the main character Seiryu-kun's genes!! They've even made a competition out of it! However, little do they know of the suspicious plot behind the whole situation. In any case this is a crazy school love comedy adventure! An adventure of an upperclassman and her friend trying to be impregnated!

(Source: dlsite)