My niece, who's going through puberty, can't be discovered. Under these circumstances, she gives me a sly smile, acts all haughty, and plays with my penis in a way that makes me feel like a pervert. (Iga Mako SSNI-870)

If she doesn't keep quiet, she'll be discovered! When her gaze meets that of her usually aloof niece, she transforms into a haughty, infatuated woman playing with her penis! The niece, who is in love with her uncle, forces herself to approach him boldly, and begins to play with his penis...