A man whose wife was stolen and ran away with another man discovers she has an M-temperament. Seeking revenge, he becomes an SM dominator known as "YAMIO" (Underground Man). Operating under the name Attackers' Hebibaku label, he rents out his home at low cost to young married couples and systematically trains their wives to awaken their latent masochism. Having already awakened the M-submissive nature of 16 married women, his newest target, Shiori Kuraki, becomes the focus of his latest operation.