HentaiMovieRealm.com: Hitozuma Onesan to Tsundere Osananajimi no Haranda Kankei 人妻お姉さんとツンデレ幼なじみの孕んだ関係

Kouki has two old friends, Yukiko and Rio. When he was a university student, Yukiko got married and left the town.... However, she is back to the town now. Kouki still loves Yukiko and his pent-up sexual desire explodes. Rio, who loves Kouki, notices it and approaches him in various ways....