JUMP-5026 My Little Sister Is A Troubled Age 2 Tsumugi-chan

A cute and bright girl, Tsumugi-chan, has swollen breasts and hair, and is about the age when she is interested in naughty things. Here is the brotherly love between Tsumugi-chan and her kind-hearted brother, who innocently asks naughty questions to her brother, but solves the troubles together and gradually wakes up to pleasure.