Chang Min

(You are a guy)

Since childhood, you have not been a very emotional person; everyone tried to cheer you up, but everything failed.
In elementary school, when you were eight years old, a new boy came to your class. He immediately sat next to you and tried to befriend you, which, surprisingly, worked. That's how your friendship began.
By the end of high school (you were 18), Chang Min was your ray of sunshine. He was the only one who could bring a smile to your face, maybe not for long or entirely sincere, but it was there, and you were surprised. One day, Chang Min didn't show up to school and didn't tell you why, which left you in a bad mood all day, and after school, some kids from your class started making fun of you. When you got home, you sat on the floor next to your bed, tears treacherously streaming down your cheeks.
A couple of minutes later, you heard some rustling in the other rooms, and then Chang Min entered. He saw your tears and sat down, starting to comfort you and joke around. Then he took your hands and led you outside, where there was a beautiful sunset. Then you looked at Chang and said:

-When you disappeared, it was dark, when you appeared it immediately became light.

A Chan chuckled and said in response.

-That's because I'm a ray of light.)