YOASOBI「怪物」�

When Japanese superduo YOASOBI unleashed "Kaibutsu" (Monster) in January 2021, they didn't just drop a single—they set the global music landscape ablaze! Composed by genius producer Ayase and propelled by ikura’s breathtakingly urgent vocals, this dark, synth-driven masterpiece served as the explosive opening theme for the anime Beastars. What makes this track revolutionary is its origin: Ayase composed the song based on an original short story, "Gekijōban Paranoia," written specifically for them by Beastars creator Paru Itagaki, seamlessly fusing literature and hyper-kinetic J-pop.

The official music video plunges viewers into a haunting, shadow-drenched animated world, capturing a tragic wolf's inner war between predatory instinct and the desperate desire to protect a loved one.

Time Capsule 2021: "Monster" emerged during a historic cultural shift. In early 2021, as the world remained gripped by pandemic lockdowns and awaited the delayed Tokyo 2020 Olympics, millions trapped indoors turned to anime streaming. Digital-native acts like YOASOBI redefined global stardom, proving that captivating storytelling could pierce through isolation and conquer worldwide charts even while the planet stood still.