Sagara Naoto is selling things in an antique dealer market. However, his items aren't always worth the money he sells them for. One day, he is found by Kazuyuki Minato who is a former classmate and the owner of an old antique shop. Naoto didn't apologize to Minato, but when Naoto asked him what he wanted, Minato said "Then I would like your body." Naoto was then taken to the antique shop that Minato runs. However, it wasn't to help run the shop but to pay with his body - !?