BRAVE BEATS

The story follows Hibiki Kazaguruma, a sixth grader who meets an amusing little robot named Bureikin while coming home from school one day. Bureikin, a dancer from an alternate-dimension dance world, challenged the dance king for the throne and lost. He has been deprived of Dance Stones (the stones of dance power) and sent to the human world. To restore his power, Bureikin must collect all the Dance Stones scattered around Earth. Meanwhile, the Dance Stones cause chaos on the human world. To retrieve the Dance Stones, Bureikin fuses with Hibiki and transforms into a Dance Hero. (Source: Anime News Network) — Description from AniList community (anilist.co).