Cosmical Rhythm

The track comes from Cradle Edge, a unit pairing HiTaZ and banami within the S.I.D-Sound circle, and rides a cheerful House Pop groove topped by auto-tuned vocals. Its most unusual trait is its reach: although it is a licensed song rather than an original, it landed in a remarkable number of Korean rhythm games around the same period, starting with EZ2AC and continuing into Pump It Up, O2Jam U and the short-lived CiRCLINK. For its PIU appearance it was credited simply as SID-SOUND, since vocalist banami had already left the label back in 2013; from this song on, the label's tracks were filed under the World Music category. Composer TOTO later rebranded as DoubleTO.

The song was revealed in the second 2015 PRIME trailer and arrived with a tidy two-minute cut, widely praised next to the longer edits used in other games. The BGA, by Felnya, tells a deliberately absurd little story: a student named Shin Hana misses her bus, starts dancing in the middle of the street out of sheer frustration, is spotted by an entertainment-agency type and ends up becoming an idol. Her face even shows up on the Prime version's waiting screen.

In PHOENIX the Single set is S4/S6/S8/S14, plus an S17 added in the 2.01 update, while Double offers D11/D15/D19. The S14 picked up a reputation as a padded chart: it debuted as a level 15 despite being very easy, with a single freeze as its only real talking point; it was knocked down to 14 in XX, and in PHOENIX even that gimmick was stripped out. D15 had a similar history, long viewed as a soft, gift-rated chart. D19, a UCS contest winner present since Prime v1.12, was bumped from 18 to 19 in PHOENIX and lost its scroll-speed tricks, leaving a cleaner chart built around weight shifts over the freezes.