Tsundere Inran Shoujo Sukumi
Japanese title: ツンデレ淫乱少女すくみ
Type: OVA
Source: Visual novel
Episodes: 2
Status: Finished Airing
Aired: Feb 17, 2012 to Apr 13, 2012
Duration: 18 min per ep
Rating: Rx - Hentai
Studios: Studio 9 Maiami
Producers: DAX Production, White Bear, Mediabank
Genres: Hentai

When the main character visits his school during summer holiday, he accidentally finds Sukumi, his classmate, masturbating in female locker room. "If you don't want me to bring it out into the open, come here every day!" Her orders gradually get bolder and they have sex in the pool...? Super erotic summer holiday! His endless summer with Sukumi now starts! 

(Source: ErogeShop)