406MFTH-010 Aren't you embarrassed? ... Why are you hard? "The innocent younger sister is fascinated by her brother's erect dick reaction?! 'Let's do it more!'" "Let's do it more!" The underdeveloped girl isn't satisfied with just one time! 【Sex Education

This is an explicit story about a naive younger sister with a developed body who receives incorrect sex education. She becomes curious and starts touching her brother's penis, asking if she can insert it. Due to her lack of knowledge about incest, she unknowingly engages in raw intercourse and multiple orgasms. The story also involves the brother providing misleading information about sexual health and encouraging his sister to engage in sexual activities with him.