CROWD NINE" -- Go through the crowd, dance the night away. A collaborative music release by IURA TOI and Ci-chan! Ci-chan's vocals run through the decadent world of lyrics in a club sound that fuses influences from genres such as house, EDM, electro, and funk by trackmaker IURA TOI. In addition, a vocal version of "Ci-chan β" was also released simultaneously with this song! Please enjoy the "difference" of each, starting with the way they sing.