If you want a OP, dominant, edgy, badass, male mc then you will definitely enjoy it ...It is also full of humour for most part. Oh yeah he also controls everything from the shadows and reveals himself in the final moments...The MC also gets character development throughout the story so till now ( ch. 840) he will be completely unrecognizable. The side characters are mostly MC's subordinates so expect the same as MC but a little toned down.
