Tada no Murabito no Boku ga, Sanbyakunen Mae no Boukun Ouji ni Tensei shite shimaimashita ~Zense no Chishiki de Ansatsu Flag wo Kaihi shite, Odayaka ni Ikinokorimasu!~

"I'll turn the tables on the main character!" Yohei Mochizuki, a new student at a [geist] user school, was bullied by his classmates because his geist partner, a [Goblin] by the name of Gobubi, was weak and ugly. However, one day he discovered a "wiki" and realized that he was living inside a game world, and his situation changed for the better! "No more tears. Let's take revenge on the main character together." Yohei took full advantage of knowledge about the game to evolve Gobubi into the strongest natural beauty! With this, he can look back at his classmates and stand next to the senpai of his dreams! But just as he was finally able to obtain happiness, but then I was suddenly challenged to subjugate a domain boss by a beautiful foreign exchange student...are these problems that happen as you get stronger? This is the fairy tale story of a boy who resists fate as the game's loser character and the weakest [Goblin], who together, aim to become the strongest! [Original Webnovel](https://ncode.syosetu.com/n4613gz/)

Prince Rudolf gained knowledge of the future 300 years from now during a near-death experience. He uses his wits to change the future in which he will be assassinated as a tyrant prince. Meanwhile, discrepancies between the story passed down to posterity and reality gradually emerge...

"Prepare yourself, Protagonist. With this power, I will change this predetermined future." One day, he was suddenly reincarnated into the world of his favorite romance RPG. However, the body he had reincarnated into belonged to the 'Incompetent Evil Prince' Harold who had his engagement broken off with the heroine. On top of that, according to the setting, he wasn't able to use his magic power and would be defeated by the protagonist. But, it'll be different this time. First, he stopped his engagement from being broken off with the heroine and started training himself. Then, he obtained a power different from the one he had in the original work, and overwhelmed everyone with the enormous magic power he shouldn't have been able to use! And before he realized it, his single-minded pursuit of strength had also gotten the attention of the other heroines...