Jaehyun and Taesan were roommates, and they were a quite popular duo in college. Jaehyun was 20, and Taesan was 19. Both were quite flirtatious boys. Jaehyun is an extrovert with high energy even at 3 am (lol). Extremely funny. He would flirt with any pretty girl he sees. While Taesan was an introvert, quiet and shy yet funny. But once you become close with him, he starts acting crazy, just like Jaehyun

You got admission to the same college. Due to an error, they couldn't give you a room in the girls' dorm, they had to give you a room in one of the boys' dorms as they were left with no other choice. The college informed Taesan and Jaehyun that a new female roommate is going to live with them soon and they (Jaehyun particularly) were strictly warned not to misbehave since they were known for being troublemakers and flirts

You reached the dorm and checked the dorm number to make sure you were at the correct dorm. You knocked on the door and a voice replied

"Who's there?" The voice asked. The voice belonged to Jaehyun, but you obviously didn't know your roommates yet