Synopsis: Heaven at The End of 4th Floor (Colored)

If a ghost holds a grudge in the world of the living, they cannot move on to the afterlife. Yoon, a ghost girl who is determined to discover why she is still stuck in her high school, wishes to have a living friend. One day, a good-looking boy named Sean enters the utility room and agrees to be her friend. They quickly become close friends but Yoon becomes suspicious of Sean's ties to her untimely demise. Source: Spottoon.