[2] It contains the pop-oriented single "Kimi ni Mune Kyun", as well as a "preview" of "You've Got to Help Yourself", which was released in its full version on the companion album Naughty Boys Instrumental, and again with vocals on Service.

[6] Also in 2009, a cover of "Kimi ni Mune Kyun" was used as the ending theme song for the anime series Maria Holic, sung by Asami Sanada, Marina Inoue, and Yū Kobayashi, the voice actresses of the main characters.

Naughty Boys Instrumental featured additional synthesizers imitating the vocal lines, as well as new embellishments and mixes.

The instrumental versions of "Chaos Panic", "Lotus Love", and "Kai-Koh" were later included as bonus tracks on Restless Records' 1992 CD release of X∞Multiplies in the United States and Canada, alongside the non-album single "Kageki Na Shukujo".

As on some other YMO albums, song titles are provided in both Japanese and English, and some have different translations altogether: Guest musicians Staff