Happy Music♪

Happy Music♪" features an animated music video that showcases the vibrant and upbeat track from Happy Around!, marking the debut single of the group. This lively piece not only encapsulates the essence of their musical style but also serves as an insert song in the climactic final episode of the D4DJ First Mix anime, enhancing the emotional impact of the narrative.

Originally unveiled on D4DJ's official YouTube channel on April 17, 2020, the video was subsequently re-released with a commercial recut on October 23, 2020. With its energetic visuals and catchy melody, "Happy Music♪" invites viewers to immerse themselves in the joyful world of music and performance.