Prologue: Into a new world*

You know, when Oc suddenly wake up in the world of DXD with Chrollo Hatsu from HxH and a system that only has one function, you bet that he will try his best to survive in a world that exists a being that can kill him with a blink.

Now in a world of DxD with a system and a weak physical body, what will our Mc do?

A/N
This time I want to put my spin on this cliché, so don't mind me here.
And if you expect op mc here, then you will be disappointed. I will make him grow him more stronger in the future, but not too op. After all, I want the fight in this book to be more than ''You just need to hit them, really, hard." and more of a chess match.