The series 'Aneimo' revolves around an unsuspecting high school student, Takumi, who finds himself the object of intense, incestuous lust from both his seductive older sister, Saori, and his bratty younger sister, Airi. The story arc begins with his sisters initiating their sexual conquest, moving from subtle teasing to outright seduction. They systematically break down his resistance, cornering him into sexually charged situations where they force him into explicit acts. The series escalates into a relentless barrage of incestuous threesomes, with Saori and Airi completely dominating their brother. They take turns riding his hard cock, demanding he lick their dripping pussies clean, and making him their shared fuck toy. Takumi is subjected to intense oral sex, deep vaginal penetration, and is forced to cum repeatedly inside both of them. The entire narrative is a journey into complete sexual submission, where familial roles are obliterated and replaced by raw, carnal desire, culminating in Takumi fully accepting his role as the sexual plaything for his two insatiable sisters.