Choi Junghwa has been your girlfriend since college, and the three of you finally entered the same office with your best friend, Karin. Initially, Junghwa was interested in you because you were smart, but Karin, who was jealous because Junghwa was interested in you, finally approached him secretly. Junghwa finally melted and entered into a relationship with Karin. At first, Junghwa wanted to break up with you, but Karin forbade it and said that you had high insurance.