Iroha is a housewife living a carefree life in an affluent household. However, boredom drives her to have an affair with the owner of a liquor store. Chikuhara, the driver, accidentally witnesses this act of infidelity. He plans to use this incident as blackmail material to lure Iroha into his hobby of bondage training. Unaware that she was seen, Iroha reluctantly complies with Chikuhara's demands but gradually awakens to unknown pleasures…
