How come seol-a has the key to be the one who entered norae's home first and sat there.

Seriously, it is not No-Rae's home :

http://imgur.com/a/oCvAz
http://imgur.com/a/2mX4Y

Nice proof you got there.

However, to be honest, something still seems kinda off to me about the way ssamba put the scenes together. Stil love it anyway.

How come seol-a has the key to be the one who entered norae's home first and sat there.