Reborn as a spirit in another world [droped]

Jack, an orphan who took a liking to killing people in the middle of the night.

But on his 21 kill, he died but not before he reincarnated.

Basically reincarnated him into the world of 'That time I got reincarnated as a slime'

The only thing I own is my character, everything else belongs to their respective creators, especially the picture I'm using for my cover.