My parent's remarriage suddenly gave me a gal sister like me who is a secret person! Moreover, since mine is the only children's room, we have to share it. Huh, I'm worried... In a room full of nerds, the hurtful words, Dassa... But this older sister was actually quite a tsundere! She's such a little devil that she made me put down my brush as if to make fun of my virginity, and she started sucking my dick when my parents weren't around!