Ore nanka kanchigai saretenai? (old title before the author changed it) (Associated Names)

Arakawa Kouki is reincarnated to a Japan with a different history than the Japan he knows with the memories of his previous life still intact. Kouki was discouraged, “Aren’t reincarnation stories supposed to be at some fantasy world filled with swords, magic and elves?!” But one day, his random scribbles leads (his mom) to the…