GVG-831 — My Erotic Q-San, Mirei Morishita

Masa-chan lives in a normal family with his mom, dad, and his cousin Mirei-chan, but six months ago, a mysterious white creature named Q-san suddenly moved in. Q-san starts peeking at his sister's clothes, fondling his mom's breasts, and playing naughty pranks on them. Then, one unexpected event after another begins to happen.