Yuta took advantage of the rare long holiday to visit his uncle and aunt. He thought he would be able to relax slowly, but unexpectedly, his uncle went on a business trip, leaving him at home alone with Aunt Waka. Aunt Waka is overly carefree, which makes Yuta shy and blush, as if she is intentionally teasing him – her large breasts swinging right in front of him without a bra. With a provocative 'revealing' way of dressing and an attitude as if she is waiting for him to act 'incestuously', Aunt Waka is playing a teasing game that is just too mischievous. In the end, Yuta's reason couldn't hold out and collapsed completely.