Rewritten the notes to include the missing information, taken from the website, and to make it clearer i.e. M-01 is an intro and does not have any lyrics, so this is now shown in the new format.
M-03 is an arrangement of M-01 on "fall into a lilac slumber":
Code:
https://vgmdb.net/album/77913
Lastly, M-04 has some male background vocals which are not credited.