(Lee Hana POV)
Have you ever met a guy who is cold, mysterious, annoying, but lovely at the same time? Well, I have! His name is Kai and I call him Mr. Black, because he likes black things all over his body. Oh god! That just makes him looks darker. 
In our first encounter, he broke into my apartment through the window when I was about to fly to my dreamland. He dragged me from my beloved bed and said, "Come with me! We need to solve a crime case." Just what in the world's happened to me?

 

Characters

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Lee Hana (OC)

20 years old

She was a princess of her family until one day she was told to be engaged to a son of another rich family that later made her ran away from home - making her living alone and working hard as if there was no tomorrow to survive.

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Kai / Kim Jongin

22 years old

Mysterious young man coming to Hana's life after breaking into her apartment. He then asked her to be involved in every ridiculously dangerous crime cases to guarantee her allowance for living.