The popular AV actress, Kaho Shibuya, competes against an Amateur couple! If the husband can endure the superb sex techniques of her K-cup huge breasts for 20 minutes, he will win a prize! If he can't endure it, the wife will be cuckolded by an AV actor and have creampie sex right in front of him! What will happen to the couple's fate against the strongest technician in the series!?