틀:Hello world!(Xdinary Heroes)/트랙 Showcase in USA 'Troubleshooting' 틀:Xdinary Heroes/노래 Hello, world!(Xdinary Heroes) Closed ♭eta: v6.2 Closed ♭eta: v6.1 아빈(아이씨유) 미쿠(아이씨유) 나예(아이씨유) 주연(Xdinary Heroes)