After 10 years. That niece, Umi, who was adorably cute beyond words, has returned as an uncontrollable S-type beautiful girl. She drags around her kind and serious uncle, teases him in the car and eats his beloved dick, shows off her daily masturbation, and forces mixed bathing at the uncle's inn to release sexual desires. Umi, now awakened as an S, performs reverse night crawls on her uncle, having carefree sex anytime, anywhere—a heavenly, wanton SEX!
