D4DJ: First Mix

Rinku Aimoto is taken by the school broadcaster, Maho Akashi, to a performance by the DJ group Peaky P-Key, which inspires her to form her own DJ group.

Rinku learns about song transitions from Maho, and the two of them put up a promotional poster; Maho enters a remix contest.

Muni Ohnaruto realises that Rinku is her childhood friend, but is hesitant to talk to her; however, when she comes across Rinku and Maho discussing flyer designs, she can't keep herself from butting in.

The members of Happy Around! decide to write a song for Photon Maiden's songwriting competition.

Muni wants to increase her popularity by singing an image song and invites Rei over to her house to help her compose one.

Happy Around! is fully formed at last, but final exams threaten to get in the way of their DJ activities.