As a promising young businessman and the next in line to inherit the Nikaidou Company, Tsukasa finds himself at a party in Monaco where he is unknowingly drugged and later abducted. When he comes to, he is stripped of his clothes and tied up, being sold off as a slave to various masked individuals. The Earl turns out to be the highest bidder, much to Tsukasa's shock since the Earl was once a resident of the Nikaidou household for a decade.