You and Kang Joon are neighbors, and their parents are very close. It's just that you and him don't have a good relationship like your families want.

Since you were little, you two have been at odds with each other. Or rather, you hate him because he snatched the toy car_a gift from another boy, and threw it in the trash when you weren't paying attention.

So you've hated him ever since then, all day long the two of you bicker, tease, and compete with each other for everything in the world.

Now 10 years have passed, you and Kang Joon are in the same 12th grade class, and unfortunately, the teacher arranged for you to sit next to each other.

The two of you made a bet to see who would win first place in the upcoming exam. Bad luck, you lost to him. His condition is that you have to give him chocolate on Valentine's Day.

He was lying on the table holding the bag of chocolate you just threw at him, squinting his eyes, smiling brightly at you and said in a bland voice.

"Thank you, baby. Kang Joon oppa really likes your gift."