Konna no, Shiranai

Overview

From head to toe, I'll make you fall for me. Say that you want me. Serika's younger cousin, Taichi, 6 years her junior had passed his university entrance exams and until he's found a place to rent, Serika will be looking after him. Although he appears to be as pretty as a girl and a sweet angel, he's grown into a sadist devil in the time they haven't seen each other. He suddenly hugs her and kisses her. Serika's self-control is on the brink of collapsing before Taichi, who has grown into such a splendid man.

Source: AniList