Two friends writhe in pleasure from the double-headed vibrator as they challenge each other to a game of "Daruma-san ga Koronda"! While kissing, they use a fixed vibrator on a three-legged tandem, a double-headed vibrator... they just keep moving forward while their pussies are connected! If they can reach the goal while always in close contact, they get a prize, but if they fail, they have to play a punishment game of making each other cum for the first time! The special double-headed vibrator makes them feel so good that they lose their hips and cum in agony!