Blonde Hair System in DxD

A Young man died at the young age of 16 saving a young kid from the infamous Truck-kun! However the next thing he knows is that he wakes up in a 5 year old body of non-other than Aether from Genshin Impact. . . . “Why do I have a Sacred Gear? And why do I have a template system giving me only blonde haired characters!?” [A/N: No there will be no lemons in chapter 1. Can’t believe I have to clarify that.]