Japanese band Omoinotake was formed in 2012 by Fujii Reo, Fukushima Tomoaki, and Tomita Hironoshin in Matsue, Japan. After performing locally around Shibuya for several years, the band released their debut album, So far, in 2017 on the independent label Neon Records. In February 2020, they released the mini-album Moratorium, which climbed to number 35 on the charts. That same year, they performed the opening theme song "Ubugoe" (産声) for the television series adaptation of Cherry Magic! Thirty Years of Virginity Can Make You a Wizard?!. The band also provided the theme song "Heartbeat" (心音, Shinon) for the film sequel to the series in 2022. In November 2020, they released their mini-album, Long for, which ranked at number 48, followed by Everblue in 2021. After signing with Sony Music in 2021, they released their debut major label album, Ammolite, in September 2023, which climbed to number 41 on the Japanese charts. It included their previously released singles "Everblue", the opening theme for the anime adaptation of the manga Blue Period, and "Happiness" (幸せ, Shiawase), the opening theme for the anime Horimiya: The Missing Pieces. In 2024, the band released the single "Billions of Light Years" (or "Ikuokukonen"), used for the drama series Eye Love You. The song peaked at number 2 on the Billboard Japan Hot 100, giving Omoinotake their highest-charting single. In June 2024, Omoinotake recorded the ending theme song "Tsubomi" (蕾) for the seventh season of the anime My Hero Academia. Their second album Pieces was released on January 29, 2025
