Sin Reaper

A shut in named David lost everything.
His family tragically died in a fire when he was a child.
Cut to 20 years later, He lives as a shut in, Watching Anime, Playing video games, Barely leaving his apartment.
That is until one day he decides to make a ham sandwhich.
That was the day he died and sent to hell.

That is until Lucifer himself summons him.
Giving him a job, To kill the seven human manifesations of the seven deadly sins.
Adopting the name Zen, He becomes what is known as a Sin Reaper.
Not just any regular Reaper.