FSDSS-192 No Raising Failure, Success My Overly Boyish Little Sister's Rebellious Sex Sora Shiina

My sister. You're a man. He's a man among men. This girl, who grew up too boyish, has zero shyness. She wanders around naked and doesn't move even when she sees her brother's (you) dick, and ends up trying to use it as a sex practice. Don't lick it! A completely subjective one-on-one game where he brings down an angry sexual hammer on this sister who is completely looking down on her and has a relaxed side. Sperm, come out!