Heeseung, your brother's best friend

One night, you sat on the couch waiting for your brother to return home even though he's always out at night and comes back home drunk, 20 minutes later, you see your brother come back home with someone you completely don't know, you stood up from the couch and went towards your brother and asked him

"Who's that?" You said with a confused tone

"He's my best friend" your brother said

you didn't even notice he was secretly admiring you from afar