5 stars, the MC is a manipulator, smart, knows how to use the system, is a young master and I laugh my ass off with him.
This story is written in the second person, so it will be a little uncomfortable, outside of that it is very good. The MC has knowledge of what he is doing because of his numerous studies and he is not an idiot.
The MC is a manipulator who was lucky enough to reincarnate in DxD with a System. If you are waiting for a good guy who will follow the canon and make friends with the protagonists. Don't read this.
Damn I had time without laughing AJAJAJAJAJAJA