When the Protagonist Turns Evil and Decides to Rule the World

Hanyu Yi is the child of the world, the one on whom the Will of the World has pinned all its hopes, and the only protagonist in this world. The Will of the World carefully shapes him: making him suffer in mind and body, leaving him hungry and destitute, and frustrating his every endeavor, so that he may become steadfast and gain abilities he never had before. At last, after enduring countless hardships, he reaches the pinnacle of his life. But Hanyu Yi does not devote his life to world peace, as the Will of the World intended. Instead, he chooses to rule the world. The Will of the World has suffered a spectacular failure. It hurriedly begs the other Wills of the World for help: Heroes wanted! Heroes wanted! Lend us a child of your world to help save ours! Payment guaranteed!!! And so, protagonists from all sorts of worlds are dumped by their respective Wills of the World into an unfamiliar realm. A World-Saving System appears in their minds, informing them that they can only go home if they save the world, and that the ultimate savior will have one wish granted, no strings attached. The dimensional-god type protagonist, the big-hearted type protagonist, the sincere tiger-man type protagonist, the energetic jujutsu type protagonist... They take turns challenging, persuading, and trying to reform him... Hanyu Yi, with an icy expression: I've already gone dark. Don't @ me. * They expected to find a world in ruins, but instead discovered a peaceful, beautiful place with a zero crime rate. They expected to see an arrogant, evil villain, but all they found was a tired young man with weary eyes. The more missions they completed, the more they broke out in a sweat... Oh no. What if we're actually the real villains? * The protagonists summon their friends and family and pull out every trick in the book. In the end, they even have to set aside their own wishes for the time being and team up to win him over. Yet progress on the mission to save the world remains stalled. Until they trace things back to the source and uncover why Hanyu Yi turned dark. "The world gave him everything, except one thing: love." The System suddenly understands and issues a mission. [New stage mission: Host, find the heroine of this world and bring the two of them together, so the child of the world can embrace the beauty of love.] Everyone: ...Not that kind of love! And how is trying to fix things after the fact going to help?! The System declares confidently: [Rest assured, the System has already prepared a heroine for the child of the world!] Hanyu Yi gives a cold laugh. "I know. But I don't need a heroine as a reward for growing up, and nobody should exist solely to love me. That wouldn't be fair to her. So I've already decided I won't fall in love with any woman." The big-hearted protagonist, who serves as the quipster, is stunned. "Does he mean what I think he means...?" The tiger-man quipster says gravely, "Yeah. That's right, System. Your child of the world is gay!" System: [AAAAAAAAAA￥@&* (%@￥#&*#!] But the final quipster, Saiki, falls suspiciously silent: ...I absolutely, absolutely must not let anyone find out that Hanyu Yi's affection for me has already reached 38095! An unconventional ensemble story (probably). It should be obvious, but anyway, this is a crossover of Saiki, Katekyo Hitman Reborn!, Bungo Stray Dogs, and Jujutsu Kaisen, with my own cyberpunk world as the main setting. Saiki is the pairing! Here are some upcoming stories! Please add them to your reading list if you're interested! Sunshine Day Student Accidentally Enters Blue Lock After being unbeatable at basketball in elementary school and getting crushed so badly at tennis in middle school that he quits, Hinata Akito decides to switch to soccer in search of the warmth of teamwork. He sets his sights on becoming a proper midfielder. But his team is so weak that Hinata Akito has no choice but to become an attacking midfielder. Still, two feet are no match for twenty-two, and his team loses the game. While his teammates tremble in fear, Hinata Akito receives an invitation that sends him to prison. Hinata Akito, excited: "I've come to become the striker of destiny!" Hinata Akito, deflated: "What do you mean, it's closed training? I can't! I have to go home and practice passing with my little brother! I'll be off, then... Wait, is that my crush, the one who looks so pretty when he cries?!" Seeing his crush charge into the prison without hesitation, Hinata Akito follows him inside, dizzy with excitement. And so, a sanctuary appears within the layers of gravity fields. PS: The protagonist, Akito, is the eldest son of the Hinata family. Since his older brother helps him practice passing, our little sunshine will be stronger from the start. Aside from soccer, this will probably be the setting with the most screen time in the story. PPS: I'm just a fan who watches anime, not a sports expert. I'll do my best to research before writing, but there will probably be some unrealistic descriptions. Please don't yell at me, pretty please QXQ Theme: Beware of grand narratives that erase personal feelings. You should love a real, specific person.