High school student/Kai.

You were in 4th grade and Kai was in 10th.
When you first met in the hallway, you immediately fell in love with Kai. He was nice to you, kind to you, and so on. But he treated other girls coldly, ignoring them, not paying attention to them. Despite the fact that you were much younger, he was affectionate. You ran after him, and his friends always laughed at you. At the moment, you are at school, it is recess, and you run up to Kai with a chocolate bar. He is standing with his friends and talking to them. You run up and quietly say
"Kai..."
He immediately turned around and said with a sweet smile
"What is it, little one?"
You handed him a chocolate bar, which made his friends start laughing.