When the sky tears open, two realities smash together! The warriors of Demon Slayer and Jujutsu Kaisen suddenly find themselves on the same battlefield, facing each other for the first time. Prepare for chaotic introductions, intense face-offs (especially Sanemi vs. Gojo!), and the shocking arrival of both Muzan and Sukuna. Can they figure out why their worlds are overlapping before everything dissolves into total war? A brand new crossover event begins!