NaN (2026/07/13 11:54)
十二音：
do #do re #re mi fa sol #sol la #la si do
C C#(Db) D D#(Eb) E F F#(Gb) G A A#(Bb) B C
上面是唱名，下面是音名

Kangetsu (2026/07/11 22:34)
Yes a Number

Kangetsu (2026/07/09 15:42)
Not a Number

NaN (2026/06/08 02:04)
Millennium