Guy Crimson in DxD?

What if Sirzechs Lucifer and Grayfia Lucifuge had a son before Millicas Gremory and what if that son was similar to Guy Crimson from tensura (the oc is not actually Guy Crimson but it is highly based on him).
DxD x Tensura X Crossover.

Small Harem probably 3+ people in harem not sure might be more.

Rias and her peerage i want to give most of them to issei the real mc of DxD

This is my first fanfiction so THEIR is gonna be alot of grammer issues etc. I am open for suggestions.

Disclaimer:- i don't own tensura or dxd

Even if the story turns out trash i will still try to finish it. I will also go back and fix mistakes with grammar etc, if i made any mistakes that is. (Story won't be effected)