The lewd rampage of the devilish little sister who seduces her dull brother begins! "Your brother's small dick is amazing!!" The cocky little sister who has gained sexual knowledge changes completely when she sees the dick of her brother who she used to make fun of!! The horny little sister provokes her brother and pushes him down. She experiences her first pleasure while teasing him, and she arches her back like crazy and reaches a climax!