Issho ni H Shiyo
Japanese title: 一緒にHしよっ
Alternative titles: Isshoni H Shiyo
Type: OVA
Source: Original
Episodes: 6
Status: Finished Airing
Aired: Dec 20, 2009 to Dec 9, 2011
Duration: 19 min per ep
Rating: Rx - Hentai
Studios: Studio Boogie Nights, Mouse
Producers: ChiChinoya
Genres: Hentai

Your childhood friend has no place to spend the night. She asks you if she could stay at your place. You obviously agree. She comes a little drunk and upon seeing that you have no girlfriend and fap only to hentai (tissues), she decides to make you a man. 

(Source: AniDB)