Rikka's boyfriend dumps her and abandons their fireworks date, so she calls her childhood friend for comfort. A sudden downpour leaves them soaked, and they rush into a love hotel together. Their closeness turns into wet kisses, naked embraces, and unprotected sex as rainwater and bodily fluids mingle. After crossing the line with a creampie, they keep having raw sex again and again like animals, continuing even after the sun rises.