Indigo's manga / #Red flag bottom(1)

_____ Koo Hojin, who constantly falls for people to a fault, and Baek Yoosung, the authoritative and arrogant heir to a large company, spend the best and worst one-night stand together. A few days later, under one condition, Yoosung pays off Hojin's debt... - Top is a cutie, bottom is a little bitch, and they fall in love messily ______