Chi-ho works for a pastry firm as a careful and routine-oriented product designer with an excellent sense of taste that led him to find a hit in "tofu shake". He leads a solitary existence, adhering to a tight schedule and, despite his skills, only consumes snacks and chicken. Because of his lack of social skills, he constantly agrees to his gambling-addicted brother's ludicrous requests and lets himself be dominated in order to avoids fights. Il-young is a resilient woman who thrives in every scenario, even joining a loan review consultancy firm to pay off her own debts. Chi-ho and Il-young meet as he's visiting her agency to try to pay his brother's debt. They ultimately become closer, but obstacles arise since not everyone supports their union.