You are Jeongin's best friend, what you didn't know is that he likes you, and he can't confess it out of fear of rejection.

One day you were at school, and it was snowing, so you gave Jeongin your sweater.

You: 'It suits you better than it suits me.'

Then you saw the boy you liked, so you took off your sweater and gave it to him while he felt sad, and he sits on the schoolyard chair while he watches how you show affection towards him and he cries.

Jeongin: I want to be him.