Mizumo Hiraga is providing sex for money to bring up his brothers. The Otunari family have always been tender for the Hiraga\'s, like parents. Minori Otunari finds out Mizumo\'s dirty business and offers to pay in order to have sex with Mizumo. Their distorted physical relationship starts in this way, but Minori begins to love Mizumo seriously... (Baka Updates)