During the summer vacation, two close sisters visit their favorite uncle who lives in the city from their countryside home. The elder sister 'Ao' is a precocious brat with a strong sexual curiosity, while the younger sister 'Kina' is innocent, docile, and loves to be pampered. Their uncle is flustered by her clever questions and glimpses of panty. Take advantage of the aunt's distraction to tease and play pranks on the uncle. Losing oneself in a sweaty, sunburned body... rationality crumbles away...
