青 (Ao)

Background
"blue" is an original song by 164. The lyrics are vague while still containing a yandere theme.
 * 1) 32 "Please let me know if there is something wrong so I can fix it."

This song has entered the Hall of Fame. It was made for the album VOCALOID™3 Library MAYU SPECIAL 2CD. It's also featured in the albums BLURRY, with GUMI's vocals; and MAYU LOVES -First-.