Kentarou ended up spending his long holiday at his aunt and uncle's house. However, his uncle was out of town on a business trip, leaving Kentarou alone with his aunt Sumire under the same roof. Kentarou was constantly nervous due to the tension. Whether she knew or not about her nephew's inner turmoil, Sumire started showing off her bra-less breasts at every opportunity. 'Auntie, um, that...' Although she was clearly provoking him, she never initiated anything herself. This overly cunning teasing drove the innocent nephew over the edge.
