有機酸
Preview this chart online, switch difficulty, adjust playback speed and share a playback position. "quiet room" is an AstroDX chart by 有機酸, archived under the "maimai DX / DX" branch, genre niconico & VOCALOID, BPM 93. This archive lists 4 difficulties (levels 2.0–12.5), including audio, a jacket image, a music video, available to browse and download.
