RONDO (燐舞曲) is a 4-member DJ group from the japanese franchise, D4DJ. The group is made up of college students who work at a club named “ALTER-EGO” and the style of music is a combination of trance and rock with touch of drum and bass. They are produced by eMPIRE SOUND SYSTEMS.

The members of the group consists of Tsubaki Aoyagi, Nagisa Tsukimiyama, Hiiro Yano, and Aoi Miyake. In universe, they are four college students who perform at a nightclub called “Alter Ego”.

Their song “Horizontal Oath” was used as the second ending theme song for the Cardfight!! Vanguard Extra Story -IF- anime, and “BLACK LOTUS” was used as the opening theme for the D_Cide Traumerei anime.