Rika and Atsushi are close siblings. They are a sexy brother and sister who have been flirting with each other since they were children and are well-known in the neighborhood. They each get a boyfriend or girlfriend, but in the end, it doesn't last as they seem to feel more comfortable with their older sibling. Rika studies AV to please her beloved brother. For the first time, she learns about slut play. She tries to play the slutty role bravely, but is defeated by her kind, sadistic brother.<br /> Suddenly, ear stimulation begins. → Starting from the toes, he takes his time to find new erogenous zones. Rika tries to act tough. "I'm not feeling anything!" she says, but her body is writhing in pleasure.<br /> While she is panting, he suddenly covers her mouth with a passionate kiss → licks her whole body → he strips her and performs cunnilingus on her. The other two are in full erotic mode. They use a vibrator and an electric massager to stimulate their crotches and reach a huge orgasm. She is made to get on all fours and her groin is stimulated and spanked. Insertion from behind → Strangling missionary position → Cunnilingus with legs spread wide & embarrassing hard insertion. Finishes with a massive creampie.<br /> After being restrained and made to cum, she is spanked and penetrated in the spread-eagle position. After some deep throating, he cums inside her again in missionary position!<br /> The abnormal daily life of an overly erotic brother and sister.<br /><br /> [Rika] 20 years old (a newly-adult college student). Quite intelligent. He usually lives his student life as a cool character, but he has a severe brother complex. Her brother's happy face is what gives her meaning in life. She likes to serve others, but her sadistic brother treats her like a sex slave (but he's kind). She only acts cute and clingy in front of her brother, but she doesn't feel embarrassed when he sees her like that.<br /> [Atsushi] Rika's older brother. 27 years old, single. Systems engineer. Easygoing but a bit nervous and sadistic. He dotes on his younger sister, who is much younger than him. She is so cute that his desire to dominate her gets the better of him, and he sometimes treats her like a sex slave. Her favorite play is titty fucking, breast massage, and nipple play. She's a boob lover. She licks them all over. He's a window-sitter at work, but he's a pacifist who believes that's where he belongs. But he's a sadist towards his younger sister. I like the look of embarrassment on Rika's face when she's made to cum or when she's subjected to humiliating play.