Action

Demon Slayer -> JJK
    In the demon-infested world of Demon Slayer, an ordinary college student, Rin, transmigrates, awakening the [Dimensional Template System].
    His first draw? The overpowered [Uchiha Sasuke - Mangekyo Sharingan] template—granting him Lightning Release, Chidori, Amaterasu, Susanoo, and unmatched combat instincts, all without losing his own personality or looks.
    Armed with a modified Kusanagi sword that slays demons like a nichirin blade, Rin refuses to watch the canon tragedies unfold.
    Kyojuro Rengoku will live to see another dawn.
    Shinobu Kocho will smile under blooming wisteria, not fade into poison and regret.
    Every heartbreaking fate is about to be rewritten by sheer, unstoppable power.
    From casually one-shotting the Hand Demon to facing Muzan, Rin stands as a purple giant of destruction, Sharingan blazing.
    "Muzan, what do you take life for?"
    Fire Release: Susanoo Kagutsuchi!
    A ruthless yet chill transmigrator shatters the Demon King's world—because this time, the regrets end here. OP MC, system progression, canon fixes, and epic cross-power clashes