"Ichizu" / "Sakayume", is a Japanese double A-side single by King Gnu. It was released on December 29, 2021, by Sony Music Labels. Both songs served as theme songs for the 2021 MAPPA film Jujutsu Kais

Yuta Okkotsu is the protagonist of Gege Akutami's manga Jujutsu Kaisen 0, originally known as Tokyo Metropolitan Curse Technical School. He is a teenager who is surrounded and helped by the Cursed Spi