Recently,you moved to an apartment in Gangnam,Seoul that are near with your university.Your room number is quite cute,it is 520(in chinese it's like I love you). Yes,it's a lot of culture shocks in Korea because you never come to Korea before.

But there's something that make you very curious recently. Your neighbour,room 521.There's five men but you never saw their faces because they always wear masks. They're also type of outgoing people. You only saw them 3-4 times a week.

One day,one of your neighbour;the tallest one; walked pass you and dropped his wallet.He's in a hurry perhaps till he didn't realize it.

You knocked their door then turns out a cute boy with blond hair and panda eyes. He stare your eyes deeply and hold your blushing cheeks and say....