The Super High School-Level Twins' Everyday Life as Shikigami Masters

On the day Hope's Peak Academy began its new school year, Hinata and Kamukura stepped onto campus. The next second, they appeared in another world, where a group of people calling themselves Time Government employees clung to them and wept as they pleaded for help. Time Government: The enemy invaded other worlds, and it's affecting us too. But only outsiders can enter those worlds. Please save us! Hinata: Just saving the world? Of course I can... Wait, why are high school students the ones saving the world?! Kamukura: How boring. And so, a citadel that had lost its Saniwa welcomed two new masters, an unusual occurrence, and set off on a journey to save the world. - *The Warring States period, where demons roam Kamukura makes a name for himself in the Demon Slayer Corps thanks to his talent. A certain brother, green with envy, looks at Hinata, who is also an older brother, and asks, "Your little brother is so impressive. Doesn't that bother you at all?" Hinata: Isn't that great? Little brothers should be this outstanding! *The tangled conflicts among the five villages A certain brother, who schemes at every turn and would even give his life for his younger brother, is stopped by Kamukura before his plan can begin. He can't help asking, "What's wrong with doing all this for my brother?" Kamukura: No. The younger brother in question would never accept it. - The blurb may change. Posting it for now. In short, this is a story about the Super High School Level Kamukura-Hinata twins becoming Saniwa and saving the world. A quick transmigration story, probably including: the Warring States and Taisho eras from Demon Slayer, the Warring States era and the five villages from Naruto, various Danganronpa settings, and possibly Jujutsu Kaisen, Detective Conan, and Katekyo Hitman Reborn. The Kamukura-Hinata twins are set up as brothers, with Hajime as the older brother and Kamukura as the younger. Lots of original worldbuilding, no CP and a gen focus, the citadel's emperor, no bashing of the Time Government. More to come... Theme: ...