"Loosing my sanity was the best thing that has ever happened to me..."

My name is Kim Eunmi and I'm going crazy. I work in my parents' small library. One day, a  mysterious man walks in and enchants me then the next moment, he leaves. It was like he never existed. And since then, I have been thinking about him non-stop. All I see is him. Everywhere I go, I cannot escape. I fell for a person whose name I don't even know.
 

Then I saw him again.
 

Am I just hallucinating? Am I just imagining him? Am I going crazy? Am I scared? 
 

Yes. I am very, very scared.
 

My name is Kim Eunmi and this is the story of how I lost my sanity.