Kamen Rider Saber from Devil High School

Ye Yuzhen, an ordinary Kamen Rider fan, was electrocuted when he slashed excitedly with the simulated Ten Holy Swords while watching the finale of Saber. When he opened his eyes again, he became Kiba Hanama - the victim of the holy sword experiment and Kiba Yuto's younger brother. On the verge of death, his artifact "Story Creation" mutated into the Kamen Rider Saber Drive. After being reincarnated as a demon by Rias, Yuzhen discovers that he has the power to change everything. In the "original work", the brother will experience betrayal, the companions will face tragedy, Hyoudou Issei is just a pervert character, and there are countless regrets that cannot be undone. But Yu Zhen was not going to accept it. His "Story Creation" can turn the works in his memory into storybooks - Naruto, Spells, Death, Dragon Balls, Fate... Thousands of powers are in the palm of your hand. Is Kamen Rider Saber not powerful enough? Create it yourself! Not satisfied with the original plot? Rewrite it yourself! Issei shouldn't be just a pervert - let him be a qualified boyfriend for Aisha. Rias shouldn't be just one of the harem - let her be the main harem. Akeno's scars needed to be healed - to accept all of her with tenderness. All confidantes will find their own place in the new "story". When the mythical war breaks out, when the most powerful god-killing beast arrives, when the "story devourer" from another dimension attempts to erase everything—— Yuzhen will open the final storybook: "King of Knights: The Legend of Yuzhen". Not to embody other people's stories, but to create your own legend. "The stories I like are written by myself."