Yuka, a dissatisfied housewife with an easy-to-orgasm constitution, and Toshiaki, a young man with a strong sexual desire but difficult to ejaculate. Both troubled, they accidentally fell into adultery. Yuka, who quickly orgasms and is no longer embraced by her husband, and Toshiaki, who cannot ejaculate and cannot satisfy her, seek each other out to fill their loneliness. However, their abnormal constitutions were far too dangerous. The more Yuka orgasms, the more Toshiaki's relentless piston accelerates. Will Toshiaki's ejaculation come first, or will Yuka's fainting come first...?