Imouto to Sono Yuujin ga Ero Sugite Ore no Kokan ga Yabai
Japanese title: 妹とその友人がエロすぎて俺の股間がヤバイ
Type: OVA
Episodes: 2
Source: Visual novel
Genres: Hentai
Studios: Collaboration Works
Duration: 29 min per ep
Rating: Rx - Hentai

After becoming a tutor for his sister Miu and her friend Riko, Kanata quickly discovers that he is much more popular than he makes himself out to be.

(Source: VNDB)