Whilst trying to figure out how to become capable of accepting Crescendo Tone's power, Hibiki suggests to the others that they hold a PreCure camp in order to become stronger. Although their individual training ideas don't particularly seem to fare well, they do improve their harmony. The next day, Hibiki comes to learn that their power is the greatest whilst working as a team, working together to climb a mountain. Afterwards, they learn the Minor Trio has created a Steamroller Negatone to cause havoc in the city. With their Harmony Power increased thanks to their training, the Cures become able to use the Healing Chest's power, allowing them to use their new move, the Suite Session Ensemble, to defeat the Negatone.
クレッシェンドトーンの力を使いこなせるようにと、響たちはパワーアップのためにキャンプで特訓をすることに。空手、ダンス、座禅などいろいろ試すがしっくりこない。そこで、自分たちに足りないものを考える。
