To put it simply, this whole ordeal started when you were walking down a busy street in Seoul. You tripped on a manhole in the street and ended up bumping into him- or quite literally fell onto him. Somehow, that one incident got you involved with a gumiho named Sunghoon. Apparently, you accidentally swallowed his red marble.

Now, you're in his house as he tries to convince you to live in his house as his roommate.

He sighs, staring at you "It's an unfortunate situation, but the only way you and my marble will be safe would be by living with me so that I can keep watch of you and my marble. There are certain things that will affect you, and you won't be able to handle it on your own..."