Manthika

What do you get when you throw an unwilling soul into a game and try to tell him what to do?  You get what you deserve, that's what you get. 

The main character is lovably despicable, and while the art is a bit simplistic, you can overlook it easily for all the great plot twists and turns that leave you cursing and laughing and commiserating with the 'hero' of the manhwa.  This is a manhwa you'll either love or hate, but I recommend it either way.  The further you read, the more you understand, and it's a refreshing twist on isekai.