Riku Kozakura is an Idol who possesses an extremely erotic face along with an extremely fit body with a tight butt, juicy braids, especially a pair of firm breasts that make many men fall in love. The episode opens with a scene of her wearing a seductive red lace outfit, writhing and masturbating, looking extremely arousing, followed immediately by a scene of her passionately showing off her cock sucking skills with her soft tongue. Kozakura's sister is not only beautiful but also possesses extremely professional lovemaking skills that make the curvy guy in the movie not dare to thrust hard for fear that he will explode at any moment.