Y/N arrives at Tokyo Jujutsu High under a fake name, hiding a truth that could change everything. To the students and teachers, Y/N is only a mysterious new sorcerer with sharp instincts, dangerous combat skills, and a past they refuse to explain. But behind the fake identity is a secret tied directly to one of the most feared men in the jujutsu world. Y/N is Toji Fushiguro’s secret eldest child. Raised in the shadows and trained by Toji himself, Y/N learned how to survive, fight, and stay hidden long before stepping into Jujutsu High. Weapons, cursed tools, stealth, tracking, and close-range combat are second nature. But Y/N is not only Toji’s child. They are also Megumi Fushiguro’s hidden older sibling. Megumi does not know the truth. Not yet. As Y/N tries to keep their identity buried, Megumi begins to notice something familiar in the way they move, fight, and watch over him. Satoru Gojo notices too, and the more he looks, the more Y/N reminds him of someone he never forgot. Secrets begin to crack. Old bloodlines resurface. And the fake name Y/N hides behind may not protect them for long. A slow-burn Jujutsu Kaisen story about hidden family, dangerous secrets, protective siblings, clan politics, and the one person Satoru Gojo never expected to care about.