It Was Sudden, But I Became a King

>Be me >Reincarnated as a deposed royal lineage >Been hiding since childhood, raised in a noble house >Have no ambition, yearn for peaceful and quiet life instead >Suddenly, the current king waged a war >Lose spectacularly >The Empire wants to topple him, but has no justification >Found out he's not a legitimate from lineage perspective >Empire found me >Suddenly dragged into their propaganda >Coronated as a king with their help >Hell Whoever said that reincarnation is a godsend opportunity, let me bash your head once.  (Crosspost with Scribblehub under the same title)