A younger sister visiting her older brother who lives alone. She can't help but look at his developing breasts with a perverted gaze. The sister watches an AV that her brother had hidden and masturbates, then falls asleep in a defenseless state. When the brother returns, he plays a prank on her thighs sticking out from her skirt. 'Brother, stop...' He licks her vagina through her clothes and makes her small, reluctant mouth suck him.
