, is a song by Japanese singer and virtual YouTuber Hoshimachi Suisei. Written by Yuki Tsujimura and produced by Naoki Itai, the song serves as the ending theme for the anime Mobile Suit Gundam GQuuuuuuX, Hoshimachi's first song to do so. The song was released by Cover Corp. and Sony Music Entertainment Japan on April 10, 2025; a ninety-second version initially served as an insert song for the anime's film cut Mobile Suit Gundam GQuuuuuuX: Beginning and was released on February 2, 2025.
Reception The song was selected by Japanese musician Koji Asano for his SBS show J-Pop Hub on April 16, 2025.
Charts Weekly charts + Weekly chart performance for "Mō Dō Natte mo Ii ya" Chart (2025–2026) Peakposition Japan Combined Singles (Oricon) 20 Japan Anime Singles (Oricon) 1 Japan Hot 100 (Billboard) 29 Japan Hot Animation (Billboard Japan) 8
Monthly charts + Monthly chart performance for "Mō Dō Natte mo Ii ya" Chart (2026) Position Japan (Oricon) 25 Japan Anime Singles (Oricon) 3
References