"Big brother, do you want to smell my anus...?" Misaki, a cute, petite high school girl, had a fight with her mother and left home. With nowhere to go, she sneaks into her brother's house while he's out and finds a playing adult video of a butt. Being of an adolescent age and sexually frustrated, Misaki starts teasing her brother with her big butt from that day on... In the end, she can't compete with her brother's wild piston-like back-and-forth thrusts and is defeated...! #ChinP