This work showcases Sayu Nanahara's captivating charm, with her role as the older sister hanging laundry featuring a voluptuous butt that's utterly irresistible, making it easy to empathize with the younger brother character and immerse fully in the story! It starts with a secret ejaculation, but the flustered moment when caught is adorably real, quickly escalating into intense thrusting that keeps the tension high. Sayu's multiple orgasms are portrayed realistically, with her pleasured expressions and moans perfectly captured on camera, especially the close-up shots of her butt that amplify the eroticism! The repeated creampie scenes drive excitement to its peak, creating a highly addictive quality that makes you want to watch again and again. The younger brother's uncontrollable urges every time he sees his sister's butt evoke empathy, drawing in viewers even beyond fans.