Please help.

Hey I'm looking for a manga or anime or novel or fanfiction where mc is above the age of 19 who is NOT an average guy before he gets reincarnated. There should also be a good reason why he got reincarnated (The reason should not be something like mc was not supposed to die/god accidentally killed mc/mc was lucky/it's just a coincidence). I don't care if mc is op from the beginning as long as it's connected to the reason why he got reincarnated (example : The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat). Also the thing that makes mc the op should not be his power instead it should be mc himself (example: Reborn In Black Clover With Demon Slaying Magic). Mc or any other characters should not have any system. I don't care if mc is a monster or human or elf. Mc should also not get easily flustered by woman. He should not be one of those edgy anime bad boy. He also should not be one of those pushover anime good boy. Mc should support gender equality like kazuma.