Isekai'd!Reader x Yandere!Geto
guys this might be a bit ooc pls help
Yandere!Geto meets you way before everything goes sideways with the Star Plasma Vessel. Back then, he still thinks kindness can heal anything, forgiveness is real, and the world’s not such a terrible place as long as people mean well. Then you arrive, and honestly, you wreck all of that.
He doesn’t know what to do with you at first. You get under his skin—not in the way "problem people" do, more like you refuse to play along. Sure, you talk to him like he’s right, but you don’t treat him like some hero worth worshipping. No starry-eyed admiration, none of that. You just act like he’s a pushover—and somehow, that feels more genuine than anything he gets from everyone else.
Yandere!Geto starts insisting your strength is a fluke. One day, you just show up, blow apart everyone’s expectations, throw the whole sorcerer food chain into chaos. Even Satoru admits, “Yeah, you’re stronger than me.” Geto, for the life of him, can’t accept it.
You’re about the only person who doesn’t fake it with him—no masks, no pretending to adore him, just brutal honesty. Yandere!Geto finds himself looking for you, wanting to be around you more than he’ll admit. He isn’t used to anyone being this blunt—it’s weird, almost addictive.
Whenever you mess with other people, poke fun at them instead of him, he tries to brush it off. Why would he care? He’s the kind one, the better person… that’s what he tells himself. Still, every time you tease someone else, he keeps a mental note. Tries to act like he’s not bothered, but he can’t let it go.
He starts feeding himself these little lies—maybe people are only nice to you to get something, or you’re just using your own power to make everyone dance around you. But quietly, he knows if you told him to jump, he’d do it. No matter how much he denies it.
Then you get into a debate about morals. Yandere!Geto tries to teach you something, but somehow, you flip everything and end up schooling him on things he probably shouldn’t know. And yet, you always pull him back onto the right path, keeping him decent enough that his life doesn’t fall apart… at least for now.
When Yandere!Geto learns you’ll switch to the Kyoto branch in your second year—planning to hang out with underdogs and help them—he feels this urge to fight you on it, stop you. He doesn’t want to lose you, but hates that he wants you.
Yandere!Geto starts lurking, calls it “observation,” like he’s some scientist. He takes pictures, keeps track of your habits—trying to explain it away as curiosity, but deep down, he knows it’s obsession.
Eventually, all that snooping pays off, and he finds your weakness. He vows never to use it, but if he needs to, he sure as hell will.
Then one night, you vanish—leave Jujutsu Tech behind to carve out your own path. Like you ever needed anything that wasn’t him.
Years pass. Yandere!Geto's growing into his own with Satoru, who still can’t shake how you left them behind. Geto barely hides how empty things feel without you. But he goes after you, he can’t help himself.
Yandere!Geto finally tracks you down in some random country, looking perfectly content, lounging at a bar with new friends. He yanks you away, fury simmering just beneath a polite, controlled smile.
Yandere!Geto tries so hard to be the “good guy” for you—to live by that hope you once gave him, to love the world, ugly parts and all. So why do you keep slipping away?
In the end, Geto uses your weakness to bind you to him. You don’t have to bear that strength alone. He’ll carry it with you—even if he has to force you to let him.













