1. Jujutsu Kaisen, the popular anime series, is collaborating with McDonald's in the United States for a limited-time promotion. As part of this promotion, McDonald's will be offering a special "Jujutsu Kaisen Sauce" that can be added to any menu item, allowing fans to experience a taste of the anime's world.

2. The Jujutsu Kaisen Sauce will be available for a limited time, starting on April 18th and running until May 15th, 2023. The sauce is described as having a savory and umami flavor, with a hint of spice, inspired by the series' dark and intense themes.

3. This collaboration is part of a broader effort by McDonald's to engage with the anime community and provide unique experiences for fans. The Jujutsu Kaisen promotion follows previous collaborations with other popular anime series, demonstrating the growing influence and popularity of anime in mainstream media and consumer culture.