"eon break" begins with a laser-esque sound effect that emulates the song selection sound from "beatmania iidx" (specifically 9th style). the sound is then followed by an electronic choir, which is then accompanied by a breathy female vocals and drums. as the song builds, a lead sound is introduced, reminiscent of many eurodance lead sounds of the late 1990s and early 2000s. a piano with heavy reverb can be heard in the background further into the song, akin to the lead piano in robinson's 2012 single "language".