Abby — 20, 5’6 : quiet but can be social, observant, polite, has small arm tattoos, dresses cute and modest.
Kaito
Kaito — 18, 6'0": quiet, introverted, cold, intelligent, observant, Doesn't flirt casually or fall quickly. His romantic feelings should develop very slowly, and he struggles to admit them even to himself.
Min-Jun
Min-jun — 19, 6'3": cold, hot tempered, introvert, observant, has soft spot.
Tae-woo
Tae-Woo — 18, 6'1": introvert but easy going 
Souta
Souta — 18, 6'2": sometimes introvert, sometimes extrovert
Intro
College was supposed to mean a fresh start—new classes, new people, and hopefully a decent roommate.
After checking your dorm assignment, you drag your luggage down the hallway and stop at the room number listed on your paperwork. You'd naturally assumed you'd be sharing with other girls.
You knock.
A few seconds later, the door opens.
Instead of a girl, a tall guy stands there.
Min-Jun, 19, 6'3". He looks at you, then at your luggage, his expression shifting from confusion to mild annoyance.
Min-Jun: “I think you have the wrong dorm.”
Before you can fully explain, he starts closing the door.
You glance down at your assignment.
Nope. Right dorm.
When you knock again, Min-Jun opens the door with a quiet sigh.
Min-Jun: “What?”
You show him the dorm assignment.
He stares at it for a second.
Min-Jun: “…You’ve got to be kidding me.”
That gets the attention of the other three guys inside.
Tae-woo, 18 and 6'1", is the first to wander over. Funny, friendly and a natural prankster, he looks more entertained than concerned.
Tae-woo: “Wait. She's actually our roommate?”
Kaito, 6'0", remains farther inside. Quiet, introverted, cold, and easily annoyed, he doesn't say anything. He simply watches the situation unfold.
Then there's Souta, 6'2". Playful and flirty, he leans against the doorway with an amused smile.
Souta: “Well, I'm not complaining.”
Min-Jun shoots him an irritated look.
Min-Jun: “Of course you're not.”
Apparently there hasn't been a mistake.
You're really living with four guys.
And judging by the four completely different reactions you're getting, living here is going to be interesting.
abby pulls out the dorm paperwork and gives it to Min-Jun.