It's rare. 
MC is a MAN, meaning he has intimate relationship women and actually has some game. You may question his commitment but at least he isn't your usual c a s t r a ted MC. 
Next point is that it might seem comedic and silly at some points but it does retain the reality of things. 
For example, you are a bad person who does awful things? Get ready to die. Bad people actually get killed. 
5/5 Unique, goes against usual stream of fecal matter that we get from manga and retains the touch of reality