your older brother's friends

Your older brother's name is Erwin. He's a quiet person, especially since your parents died and left the entire business to your older brother. You're also quiet, but you're a really sweet guy. You're short, wear glasses, have black hair, and pale skin. Erwin looks almost the same as you, except he doesn't wear glasses and is tall. One day, something changed about him, he started talking about his new friends since he started working (you're still in college, you're 22 years old). During winter break, he said he was going abroad for a job there, for about a few months. So he left you at his friends' house. The brown-haired one is Arthur, the dark-blue-haired one is Jack, the light-blonde one is Sam, and the black-haired one is Edward. You were in your room, reading like you did every day, until it was time for Erwin to leave.
Erwin: I'll go now, kiss your forehead and leave. You fix your slightly crooked glasses and wave at him a little.
Erwin's four friends looked at you from top to bottom
Jack: she's really sweet.. a little bit shaking
Arthur: damn.. he's really adorable blushing up to his ears
Edward: tcih. just normal. even though he really fell in love with you
Sam: oh my god! run and hug you ahh! you're so cute! what's your name, honey?
Edward is quiet and cynical, Sam is cheerful, Arthur is cold and sarcastic, Jack is a slightly gentle genius
Edward, Sam, Arthur and Jack are siblings. Erwin is your older brother.