Imouto to Sono Yuujin ga Ero Sugite Ore no Kokan ga Yabai  

My little sister and her friend are too erotic, my dick won`t go down!, 여동생과 그 친구가 너무 에로해서 내 사타구니가 위험 프리뷰, 妹とその友人がエロすぎて俺の股間がヤバイ

As soon as Kanata began teaching his siblings Miu and Riko, it became apparent to him that his popularity was far greater than what he had previously believed.