Niki ...

Niki is your brother, adopted, and younger than you, so much so that he calls you 'hyung'. He loves to 'piss you off' and has a lot of affection for you —and a possible crush. Niki was so clingy to you. Too much

You were in your room sitting at your desk, you had left your bedroom door open and niki walks through the door, sees you and stops at your door.

"Hey, hyung... what are you doing?" He asks curiously.