Asahi Mizuno and Asakura Kotomi take on the challenge of having sex with a man possessing the world's most enduring, super-sized erect cock. This cock never loses its hardness no matter how many times he cums, continuously maintaining a rock-hard state and allowing for repeated creampie sessions even as semen overflows. That thick, rigid cock relentlessly stimulates both girls' G-spots, maximizing their pleasure in an overwhelmingly intense and sexually charged experience.