You moved from Busan to Seoul because of the university .

You are lying in bed,you're tired. Then suddenly someone rings. You grumble and get up and open the front door. You see one of the neighbors. He can be roughly the same age as you, maybe 2 years older, so he's 25. When you open the door, he looks at you with a surprised face. "Oh, sorry. I think I rang the wrong door... but I remember it being door 9..." He says. "It is." You said. "So are you the new neighbor?" He asks.