Nodoka and Hinata join some of their classmates for work experience at Chiyu's family inn. Also joining them is Asumi and Chiyu's little brother Toji, who hopes to become more like his sister. Chiyu instructs Toji and her friends on good hospitality, but Toji begins to struggle when his hard work and kindness cause him to get into troublesome situations, leading Chiyu to scold him. However Pegitan, who had secretly watched Toji, asks Asumi to encourage him, which Chiyu overhears. Suddenly Guaiwaru appears, having powered himself up using a Mega Part like Shindoine, and transforms one of the inn guests, Mr. Chikara, into a GigaByogen. The girls transform to fight it while everyone else evacuates the inn. However during the fight, Toji tries to rescue a puppy from the monster and nearly gets hurt but is saved by Cure Fontaine. Cure Fontaine uses her Ice bottle to subdue the GigaByogen, with help from Cure Earth, before all four Cures purify it using Final Healin' Good Shower. Afterwards, the puppy is revealed to be Mr. Chikara's, who thanks Toji for rescuing it. Chiyu also expresses how proud she is of her little brother.