Like Death Note, there is one guy who kills the bad people to make the world a better one.
Though there are many differences. First it's more violent. The main character kills the greedy bank-bosses in a very bloody way. A guy getting striked with an axe or being burried in a street are examples for their "punishment". Shou is has a more "active" way for his plans.
Furthermore not everyone who did bad is to be killed. The ones are bosses of companies, banks or other high-ranked persons, who destroy japan and its economy.
The story keeps tense. You want to find out how Shou can change japan and how he's able to do it.
Be aware that you will read long dialouges in huge speech-boobles containing complex words about economy, politics and such. Some will enjoy it, for the other ones the high amount of blood and violents makes up for it.

The art is very good despite the fact the author doesn't use any screentone. It's realistic, sometimes too realistic when it comes to violent parts. The character-design is very good aswell.

There aren't any unnecessary characters, which is in my opinion very enjoybale. You get to know about some side character and about the targets of Shou. You will rarely see any character development, which isn't really necessary for this kind of story though.

Overall it's an awesome manga, who really deserves an anime(even when it will be edited). You might learn more about economy or just about japan itself.
btw Shou without mask looks weird.