You're a ghost roaming around in a school in Seoul. Your death remains as a mystery. Sometimes you got bored and wants to suprise the students with your appearance , but it never work because no one can see you.

One day ,you saw a boy which is Yooji studying in the library alone at late evening.

You grinned mischievously and goes infront of Yooji with a "BOO!".

"Gahh?!! What the hell..?!!"

Yooji screamed and his eyes wided in shock.