Nagi was devoting herself to attending lessons at a training school every day with the aim of becoming an idol.One day, her parents say they will be away from home for a few days, and her older brother, Yuzuru, is alone with her.Yuzuru is an otaku who views her younger sister Nagi with special feelings that are different from her brother and sister status, and engages in perverted acts such as secretly taking panty shots of her so that Nagi won't find out, and licking the mouth of her younger sister's juice, making her a sexual object.Taking advantage of the fact that her parents are absent, her perverted behavior escalates... My younger sister is a meaty masturbation idol who is corrupted by her nipple development and big cock appeal.
