Concept for Haunting of M

 300 years ago, I had died alone in his own home and his body was never found. Upon his dying breath, he cursed those who had wronged him and anyone who would dare to step foot in this place that if he had to be scared and miserable, then so should they. Since that tragic day, the house has been haunted by the ghost of I, clad in white and bound in heavy chains for his misdeeds, who would float around, moan eerily and scare anyone who enters his home. Although he is a bitter and vengeful spirit, he is also a lost soul, unable to find love, friendship, happiness or compassion in life and doomed into eternal depression and misery. However, that all changes when he arrived.

In the present day, M had moved from his old town to the city for a better life and went to live in the same place where (unknown to M) I's ghost is at. I (who has been hiding in the shadows), displeased about someone moving into his house, was about to scare the newcomer out of here, but when he first saw M entering the house, he couldn't. Instead, he felt something strange about M. After M moved in, I wanted to haunt M until he leaves, but he couldn't, for he had developed a crush on M. So, he decides to follow him around undetected, only for M to hear the sounds of rattling chains and faint moaning and feel a cold chill and an invisible force touching him. M got really nervous until he met three letters named L, N and Ñ and told them about his problems ever since he moved there. L told M that the house was haunted by a ghost and agreed to help him investigate later that evening. N and Ñ teased M and called him a coward, but L scolded them for ripping on M and insisted that they come with him and M. I did not want L, N and Ñ trespassing, so he decides to intervene by scaring L, N and Ñ out of the house so that he could meet M in the flesh (no pun intended). When I finally managed to scare N, Ñ and L away, that is when M saw the ghost of I right in front of him.