Nobody talks about this one. That's because it exists in the margins of a franchise most people abandoned after the show, but if you found something real in D4DJ's mess of characters and rhythm-game tie-ins, this special is exactly what you came back for: three minutes of set preparation anxiety, a chapel scene that nails the specific loneliness of wanting something badly, and an OST that treats a one-off festival like it matters. The show moves slow and asks nothing from you except to sit with girls who care about their music. You get out what you bring to it.

The legendary DJ festival D4 FES. has been revived, and Merm4id's long-held dream of taking part is finally coming true. During a swimsuit photo shoot, Marika, Saori and Dalia grow worried about Rika, who is behaving unusually. Meanwhile, Tsubaki of RONDO sits alone in the chapel, imagining how their world might grow next. After a live show at the clubhouse ALTER-EGO, Rika bursts in on Tsubaki while she is with Nagisa, Hiiro and Aoi, and makes a surprising proposal. Rika is someone who gets through anything on luck and charm, determined to enjoy life. This self-contained music special brings the two groups together, including a new joint performance.