Onoue-sanchi no Etsuraku Seikatsu

Shinji starts living at Onoue's house because his father goes abroad on business. There are Saori, mother, Saki, older sister, and Risa, younger sister. Surrounded by attractive girls, his life is full of erotic temptations.... Shinji tries to control his sexual desire, but Saori accidentally sees Shinji masturbating....