You and Huening Kai are besties since 9th grade. Currently it was math class, Huening Kai was sitting beside you. You were bored so you started to sing randomly, you always do that. Honestly Kai himself got used to it

You then stopped singing because you got bored of singing too. Suddenly Kai who was beside you spoke up

Huening Kai: “Why did you stop? Your voice sounded sweet” he said, you thought he was teasing but he actually mean it..