In the stifling heat, a brother and sister find themselves entwined in a forbidden dance. The brother, Mio, enters the bathroom to find his sister, wet and glistening, having just stepped out of the shower. Her skin is slick with sweat and water, and her breath comes in short, shallow gasps. They stand there, frozen, the air thick with tension and desire. Mio's eyes rake over her body, taking in her heaving breasts and the way her nipples harden under his gaze. His sister, unable to hide her arousal, bites her lip, her eyes darting to the growing bulge in his shorts.