DxD Re: Issei

MC takes Issei's place as a child and knows he is screwed, he is the protagonist of a series where the previous inhabitant of his body was made more powerful by the power of breasts and LOTS of weave armor, he knows he must become strong because if he doesn't end up like the original Issei he doesn't have the invincible weave armor to protect him this time. MC is smart and not someone easy to manipulate, he has his own goals and he will achieve them no matter how many heads he has to step on to get there. Possibly it will be a harem, but definitely not a big one.