Reincarnate as a skeleton and force me to be a hero?

"Ah! Skeleton monsters! Skeleton King! Skeleton Dead! Pale King! Oh, it's you, Master Brave! That's all right." The Skeleton Brave placed the Demon King's head before the King, tapping the table with his white knuckles. "Tell me, where is the next Demon King?" "Master Brave, you've killed all seven Demon Kings." "You're lying! I only killed six. Tell me, where did you hide the seventh Demon King?" "The seventh Demon King has surrendered to us. If he dies, all the dungeons on the continent will collapse. Please, Master Brave, spare his life." ...My name is Charles, a Brave Warrior summoned to another world by the Saint. Good news: I've successfully bound myself to the Brave Template, and my Brave Talents are refreshed every month. Bad news: I was summoned two years after my death, reduced to a weak and helpless Skeleton Monster. After striving to become stronger, slashing through dungeons, and becoming the strongest Skeleton, I discovered that the Saint had summoned several more human Warriors. Okay, you're trying to compete with me on your KPI, huh? Then roll up! Um, Demon King, don't run, your head will be counted as a hero's achievement! ... This book is also known as "The Hero Is Not Human Anymore!" "Reincarnated Skeleton, Forced Me to Be a Hero?" "Hero, But a Skeleton Monster?" "Saint, Dragon Lady, Witch Lady, Skeletons Can't Fall in Love!"