Mio returned home for the summer festival after a long absence and found her sister's sons had grown into full-grown men. Among them, one nephew especially caught her attention—his thick, rock-hard erect cock. The moment Mio saw it, her body began throbbing with excitement. First, she performs a masturbation show for the older nephew, bringing his cock to full erection, jerking him off until he squirts, then making him shoot a powerful cumshot. Watching from inside the closet, the younger brother grows eager for his turn. He approaches Mio in the shower and gets thoroughly drained by her tight titfuck. Soon, a jealous battle erupts between the two brothers over who gets to penetrate Mio. Trying to calm them, Mio pleads, "Don't fight over me." What will happen next?