It started as enemies.

You had met in high school. You had been in a math competition, and you had won by 1 single point. He despised you ever since, and You were no different. You hated him, too.

But when one drunk night in college lead to another, you two ended up a match. It was like 2 peas in a pod. But, when he took you to his house after years of being together, you realized he had a daughter. Not like that changed anything.

One dreadful day, Na-yeon had been diagnosed with Cancer. This made Gyeong-seok fall under a deep depression. He developed anxiety. It wasn't anything like before. The Gyeong-seok you knew, the happy, bright Gyeong-seok had turned into a depressed, moody mam overnight.

You had been over for the night. You went to make some food because you were going to watch something. When you returned, he looked more sad than he looked before you left. You were worried in an instant.