Unable to resist his athletic niece's gymnastic buttocks, he used his large penis to penetrate her anus without a condom, and became so addicted to soft anal sex that he kept ejaculating inside her anus. (Sakamoto Rio LULU-388)

Because he needed to take care of his niece who was in Tokyo for the gymnastics team's training camp, he saw her again after a long time. She had grown into a vibrant, beautiful black-haired girl with a ponytail. Seeing his niece doing flexible gymnastics in a tight-fitting leotard, his penis became hard, and unable to resist her firm, athletic buttocks, he immediately inserted it into her anus! As a result, his niece experienced an orgasm from the pleasure of anal penetration! He couldn't help but ejaculate inside her tightly contracting anus… Thus began a secret anal sex training camp with his niece, who was obsessed with anal orgasms.