The bastard child becomes the empires royal consort

Leon, the world's greatest special agent, dies after a questionable accidentOnly to be reincarnated into a novel he just started readingNot only did he reincarnate, but he reincarnated into one of the three grand duke familyBut as an illegitimate child, a bastardBut so what? If the world calls him a bastard, he'll just be one***Hey so if you are reading this, I am writing this novel for my own satisfaction, so I can't guarantee a good read, nor can I guarantee consistent upload schedules, I'll be posting and doing whatever I want, but yeah hope you stay and read :)