Datte Ai ja Nai!?

Keisuke has taken on the debt of a junior by borrowing money from the black-market lender, Suganuma. But, when the loan is due, Keisuke can't return all the money. So Suganuma is asked to do H things with him in exchange for the interest due. While using his body to pay back the rest of the debt, a relationship grows and Suganuma starts to be attracted to Keisuke's bravery.. Will the situation go on as expected?!.