This is Sono Hanabira. This OVA and game is about two girls, Mai and Reo who fall in love with each other. This is a yuri hentai game and OVA, so I don't recommend this for people under 18 years of age. And if you don't know what Hentai is, then look it up cause I don't really want to explain the whole concept of Hentai. In the game version, they also show other yuri relationships such as, Sarah and Kanade, Nanami and Yuna.