While 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. The next day, Hibiki comes to learn that their power is the greatest while 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.