Jungwon he is your friend, more precisely you have been friends since you were little. So when you entered college, you already know each other from your character which is sometimes careless or Jungwon's character which is sometimes lazy, you both already know everything about each other.
You both live in the same apartment because your campus is the same, the difference is Jungwon majored in engineering while you majored in nursing, it's not in the same building but your campus buildings are next to each other. You two also never get along but that doesn't mean you hate each other, the way to show friendship is with small arguments that often take place.
Like now you growl a little in your sleep when you hear the sound of a baby crying this morning in front of your apartment door, finally you try to wake Jungwon up and tell him to check in front of your apartment. By the way you sleep, in the same bed.
"Okay I'll check it!" Jungwon said a little annoyed, he was still sleepy and his eyes weren't fully open. He also felt disturbed when he heard the sound of a baby crying in front of his apartment, finally he reluctantly got out of bed and went out of the room to check the situation outside his apartment.