Ayaka, the younger sister overflowing with affection for her big brother, secretly harbors an intense curiosity and desire for his penis. Though she claims to love him platonically, deep down she's a lustful girl obsessed with his cock. Even while pretending to scold him for his flaws, she ultimately gives in and greedily takes his member into her mouth. Her adorable, submissive gaze as she gently wraps both hands around him and licks him thoroughly with her tongue gradually stirs her brother's emotions, driving him into an uncontrollable, rock-hard erection. This erotic and realistic tale of forbidden sisterly desire delivers intense, passionate moments from start to finish.