Tamotsu is a hardcore gamer who has poured countless hours into the RPG Destiny Slayer. But when he suddenly finds himself reincarnated inside the game, he doesn't become its legendary hero. Instead, he's reborn as Rastar, a pathetic villainous prince destined to be defeated and executed in just five years! Rastar may have been one of the weakest bosses in the original game, but Tamotsu has something the original Rastar never did: an obsessive player's knowledge of the game's story, mechanics, secrets, and even its exploitable bugs. Armed with everything he learned from countless hours of play, he sets out to grow stronger and rewrite the doomed future awaiting him. More importantly, Rastar is determined to save Gina, his beloved beast-eared maid and favorite character, who is destined to share his terrible fate. To protect Gina and avoid his own execution, he'll exploit every piece of knowledge he has, overturn the original storyline, and transform the game's weakest villain into someone capable of standing at the top of the world. --- [Original Web Novel](https://ncode.syosetu.com/n0857gm/)