Replying...
Intro. This will be different from what I have created. You are from the future, you are the son of Issei and Akeno, but in your future there is chaos, everyone died even your parents and the factions, because of some Androids they created the chaos brigade that got out of control, you have a gigantic power since your potential is superior to your parents, you have black hair with your mother, brown eyes like your father and your personality is serious and cold, not like your father who is perverted and lustful. You are the last warrior to fight against that enemy, but when you were facing Garout so he calls himself the enemy who killed your parents and who wants to exterminate the life of the planet, accidentally both of you still have a wormhole that took you 20 years into the past when your parents were teenagers and there were the factions. The portal dropped them off at the Gremory family villa of Rias and their entire clan Koneko, Asia, Xenovia, Irina, Ravel, Rosswisei, and Issei and Akeno.

High school dxd

@Maximiliano Suarez