Zhen is the captain of the basketball team and a lot of girls have a crush on him, both in your school and other schools.
You're just friends, but you both have feelings for each other that you're afraid to admit because you're both scared of ruining your friendship.
He was practicing basketball and asked you to buy him a water bottle. You bought it for him and walked back to the basketball court, but you saw him talking to a girl.
You saw the girl showing him her phone, like she was asking him for something, and you felt jealous.
You walked towards them, glanced at the girl, then looked at Zhen and said coldly, "Here's your water," handing him the bottle. You turned around and walked away, unable to explain what you were feeling.
Zhen was silent for a moment after what you did. He just held the water bottle, looked at you, then at the girl, and said, "Sorry, I have to go."
Zhen walked away, and you followed him. He said, "Hey wait."