The undying Sakura Trees return. Based on a PS2 sequel of the original DaCapo game, the story once again takes place on Hatsunejima, but is set 53 years after the events of D.C. and D.C.S.S.. Although some characters will probably look a bit familiar to the initiated eye, the cast is a new one. The new main protagonist is Yoshiyuki Sakurai, who lives next door to the Asakura sisters Yume and Otome, who are the granddaughters of Junichi and Nemu from the first season.

A special episode focusing on the story of Merm4id and Rondo, including a new, joint performance by the two groups.

Arisugawa Academy's DJ unit Lyrical Lily is known for bringing smiles to people's faces through music. Thanks to their efforts, the local city hall requests them to perform monthly for a year as part of Operation Beckoning Cat, the town revitalization project. Unfortunately, given the long and demanding event, Lyrical Lily wonders if they can successfully meet the expectations placed on them. To better their chances, they decide to invite the DJ units that supported them during their first performance: Happy Around, Photo Maiden, Peaky P-key, Rondo, and Merm4id. Intrigued by the opportune event, the other units gladly accept Lyrical Lily's request. However, the project is extremely demanding. To attract visitors and new residents to the town, the energetic girls of the participating DJ units must give their best to create a memorable experience for their audiences.

Having lived abroad in Africa for most of her life, Rinku Aimoto is now returning to Japan to attend Yoba Academy, a school where DJ units—groups made up of DJs, vocalists, and dancers—are extremely popular. There, she meets Maho Akashi, an aspiring DJ who teaches Rinku the basics of DJing. The girls attend a performance by Yoba's famous DJ unit Peaky P-key, and struck by inspiration, they decide to form a unit of their own. Rinku and Maho soon recruit Muni Oonaruto, a talented artist and Rinku's childhood friend, as well as Rei Togetsu, a shy and caring pianist. Newly named Happy Around, the group aims to use the budding friendships and combined talents of its members to become one of the top DJ units in the country.