Sayaka will do anything to help out the relatives who took her in after she became an orphan. When the restaurant owned by those relatives is about to be taken away because of debt troubles, Sayaka herself becomes the new collateral for the restaurant in order to get an extension on their loan repayment deadlineon the condition that she serve as the new "plaything" for Subaru, a famous model who doubles as an employee of the loan company. What exactly will "plaything" entail...?