Baby-faced yet beautifully busty Ichika Aoi returns to her hometown after several years and reunites with her childhood friend Tatsu, who still lives nearby. Their memories of playing doctor as kids inspire an adult role-play reunion. Unable to take his eyes off her bursting breasts, Tatsu finds their old stethoscope and nervously places it against her chest. As he listens to her pounding heart and examines other spots, Ichika blushes and begins moaning with pleasure.