Every human is happy since the first time he sets a foot into this world, the only thing that can destroy this happiness are the 7 deadly sins. It's totally irrelevant if you're the one that sins or someone else. Let's say a women is committing a sin of wrath in killing her husband, both fall into despair, despite the non sinning of the man. This story is about a pure boy who's life changes because of the influence of the 7 deadly sins. His name is Erwin.