"A Kind Protection Named Debt" With a beautiful appearance and a lovely name, Seonyul grew up in an unfortunate family due to her parents' debt. Upon becoming a legal adult, she receives an illegally forged inheritance document stating that she will inherit her parents' debt, leaving her feeling hopeless about the future. Just when she was being violently threatened by creditors, Huharyeon, the third daughter and executive of the second-largest company, QP, takes Seonyul to her home. Huharyeon claims to be a creditor, speaking coldly at first, but also takes on the role of a protector. She covers Seonyul's college tuition and begins to provide more than what is necessary for her daily life, taking care of everything from meals to other needs one by one... Thus begins the sweet care of a creditor that is far too sweet!