Go Riyou wa Keikaku Teki ni summary:
Makoto Kanekura works hard every day to pay off his father's debt. One day, the black-market lender Manami Godai hooks him up with a lucrative job. "Every time you sleep with me, I'll slash $300 off your debt." Makoto steels himself for the worst, but it turns out he's not the bottom...! This is a money-driven romance about an innocent young man and a loan shark who loves to bottom!