Li An awakens in a chaotic version of Tokyo on Christmas Eve, only to discover he has transmigrated into a merged world of popular anime series. What he expected to be a peaceful slice-of-life existence quickly turns into a nightmare as Cursed Spirits from Jujutsu Kaisen rampage through Shinjuku during the Night Parade of a Hundred Demons. Facing certain death without any apparent powers, Li An is saved by Miwa Kasumi but soon realizes ordinary humans cannot survive this battlefield.

Suddenly, his golden finger activates: the template of Rimuru Tempest, the powerful slime from That Time I Got Reincarnated as a Slime. With access to supreme abilities like Predator, Great Sage, and Demon King's Pressure, Li An instantly crushes a monstrous curse and emits an aura that terrifies even Special Grade sorcerers like Gojo Satoru and Geto Suguru. As the strongest figures in the jujutsu world sense a god-like presence descending upon them, Li An must navigate this dangerous crossover universe.

Armed with the power to devour and analyze divine entities, he begins his journey not just to survive, but to dominate every realm he encounters, turning the tide against ancient evils and reshaping the balance of power in this comprehensive anime world.