The girlfriends of a couple start in the changing room while playing "Daruma-san ga koronda" (a Japanese game in which a doll falls down), and if they can press the goal button in the hot spring, they will win a prize. However, if they stop, their boyfriends and others will interfere with them in a sexy way! If they move or get excited and make a sound, they're back to square one. Will they be able to endure and get the prize? A miraculous NTR raw creampie battle between couples.