Reborn to be the Dragon King

Brenton is the trueborn heir to the Dragon Throne. When his bastard brother, Devlin, crashes a dragon into the castle, killing the King, Brenton takes the fall to protect Devlin, but Devlin arranges for a harsher sentence for Brenton, killing him with dragonfire. However, instead of dying, Brenton is sent a few months into the past. Now that Brenton knows Devlin's true nature, he resolves to take control and get revenge.