"Z no Chikai" is the theme song of the ''
Dragon Ball Z: Resurrection 'F'''
anime film, which Momoiro Clover Z's members also perform in by voicing "angels from hell." The lyrics to the song were written by
Yukinojo Mori and inspired by
Akira Toriyama's
Dragon Ball series. The single was released in two versions; an and a . The "F" Edition contains two tracks and their instrumental versions, a
Blu-ray Disc of the title track's music video and has cover art depicting the group's members dressed as
Dragon Ball character
Freeza, while the back cover has a similar image as it would be seen through one of the series' "Scouter" devices. The "Z" Edition includes a cover of
Dragon Ball Z's original opening theme song, "
Cha-La Head-Cha-La" by
Hironobu Kageyama, and an instrumental version in addition to the previous four tracks, with front and back cover art illustrations depicting the members in a
Dragon Ball-style drawn by
Toei Animation. A shortened movie version of the song is included on the ''Dragon Ball Z: Resurrection 'F''' original soundtrack released on May 8, 2015. An English-language version of the song titled "Pledge of "Z"" was recorded for use in international versions of the film.
Kanako Momota admitted that the English lyrics had to be transliterated into
katakana so that the members could sing them. Momoiro Clover Z included a new version of "Z no Chikai", subtitled the "-ZZ Ver.-" and arranged by
Tomoki Hasegawa, on the limited edition B version of their 2019
self-titled album. ==Music video==