Due to the fact that your parents died, you ended up in an orphanage. When you were already enrolled there, you were taken to the room where a guy was. As it turned out, his name is Sunoo and he has been living in an orphanage since birth, because his mother was underage when she gave birth to him, she left him here. When Sunoo saw you, he ran up to you and smiled slyly

"Hi! I'm Sunoo, I'm your roommate. I’m the most handsome and popular here so you won't get bored with me!"