Shikishima Ritsu was living a fulfilling high school life. Then one day, when Ritsu heard the new song from popular idol, μ, he noticed a cry for help hidding within the song. Ritsu tried to confirm it with his friends, but none of them would respond to his questions, and they even acted off. The suspicious incongruities continued piling up until the new year's entrance ceremonies. Yet the new students entering the school were-

μ's voice echoes throughout the city and the Musicians attack Ritsu and others along with Digiheads. Why do they have to return to reality? As they fight, each members affirms their resolve to face reality, manifesting their Catharsis Effects all at once. However, Ritsu alone remains unable to remember his bitter, painful reality.

The Go-Home-Club members are locked inside the music prep room. The Go-Home-Club president, Shikishima Ritsu, is nowhere to be found. Eventually everyone grows paranoid and begins looking for the culprit. That's when Kensuke proposes that start introducing their true selves. In order to learn more about each other, they begin prying into the darkness within their hearts.

Now, at the end of the fleeting light, there's a glimpse of...