"Ring" is an original song by R Sound Design featuring vocalist 向日葵 (Himawari), introduced to maimai DX with the BUDDiES version on February 29, 2024. Classified under the オンゲキ＆CHUNITHM genre, it first debuted in CHUNITHM NEW as an unlockable track on its launch MAP (NEW ep.I, Side A, MAP 3), then crossed over to オンゲキ bright MEMORY on September 1, 2022, before arriving in maimai. The Asian maimai release followed on May 3, 2024, and the Chinese version (舞萌DX 2024) received it on April 16, 2025. Musically, "Ring" is a mid-tempo piece at 132 BPM blending pop and electronic elements. Its lyrics, penned by R Sound Design himself, explore themes of wandering through darkness, lost memories, fragmented love, and an unspoken "thank you" left too late. The vocalist Himawari delivers a performance that shifts between fragile introspection and soaring release, giving the track an emotional weight that has resonated with players across all three rhythm game titles. In maimai, the song received DX charts across all four standard difficulties. The Expert chart (Lv 9+, constant 9.6) was designed by はっぴー (Happy), while the Master chart (Lv 12+, constant 12.8) was handled by Jack, both well-known charters in the maimai scene. With 655 notes on Master, the chart presents a moderate upper-tier challenge within the 12+ bracket.