"Rock-Hard Secret Club" – This time, the AV industry is represented by Unpai, Nana Yagi, and Wakana Sakura, each revealing their personal secrets. Also joining from the entertainment world are the duo kitsune, famous for their sampler-based comedy acts. Kitsune Awaji claims that syncing thrusting rhythm with heartbeat dramatically increases excitement. This theory sparks a heated debate, splitting the men and actresses into opposing camps. Is faster thrusting better, or does slow and steady win the pleasure race? Which side are you on?