Otasuke Chara ni Tensei Shita no de, Game Chishiki de Musou Suru ~Unmei wo Nejifusete, Saikyou wo Mezasou to Omoimasu~お助けキャラに転生したので、ゲーム知識で無双する～運命をねじ伏せて、最強を目指そうと思います～

Living the dream of reincarnated life in his favorite romance RPG, "m9"! Or so he thought, but he was reincarnated as Ash, the "helper character" who sacrificed his life for the awakening of the game's protagonist, Rayen! Even though he was supposed to be reincarnated, he is destined to be sacrificed if things continue as they are. However, if he avoids this, Rayen will not be able to awaken as a hero, and the world will be conquered by the Demon King's army... "I absolutely do not want to die!" Ash decides to fight against his fate in the game! Utilizing his knowledge of the game from his previous life, he contacts the game's strongest character and learns swordsmanship and magic in order to survive. Will Ash be able to overturn fate and save the world alongside the hero...?!