Sins: Sealed away

(I don't own the art used in the thumbnail.)
In the small town of Siape lives a young necromancer. Like many others of his profession, he wishes to rule the world but is clearly unable to with his subpar magic, wich isn't even strong enough to help him get to the next town to get more spellbooks. So, as you might have guessed, life for him is not going great. yet when he destroys an ancient pillow he bought from a young salesman, and it turns out to be the sealed form of the demon of Sloth, he quickly grabs the chance for world domination! Together, they set out to find the other sins. and cause some mayhem in the process!