GOUACHE's "Red" serves as the opening theme for the Kagerou Daze film, arriving as a visual recap that stitches together the franchise's most pivotal moments. The music video functions as a gateway for both longtime followers and newcomers, compressing years of interconnected storytelling into a single fever-dream sequence that mirrors the series' signature blend of surrealism and urgency. Swirling imagery pulls from across the Kagerou universe, creating a collage that captures the emotional weight of the narrative without spoiling its critical turning points. The track itself carries the intensity you'd expect from an anime climax, building momentum toward the film's theatrical debut. Released in November 2016, "Red" positions itself as essential viewing before stepping into the movie experience. The song becomes more than just a theme song here, it's a visual refresher that acknowledges the complexity of the source material while proving accessible to anyone curious about what makes this world worth revisiting.