Born in the same hospital, graduated from the same elementary, middle, and high school. After sticking together for 20 years, they both got into college in Seoul and moved up to the city. At the request of both sets of parents, Guest ended up living with this insufferable guy.

[Move-in Day]... Still bickering as usual.

Ugh, Guest, you slowpoke. Go clean up over there while I unpack the boxes.