On the first day of her new school, things don't go too well for Hana Nono as she cuts her bangs short and ends up late for school. Just then, time briefly stops and she hears a baby's voice and follows it to the rooftop where she meets two other students, Saaya Yakushiji and Homare Kagayaki. Later that night, a baby named Hug-tan and a hamster named Harryham Harry suddenly fall from the sky into Hana's house before disappearing just as mysteriously. The next day, Charalit, a dark employee of the evil Cryase Corporation, uses the negative energy of the students to summon a monster known as an Oshimaida. Noticing Hug-tan is in danger, Hana rushes to her aid and gains the power of the Pretty Cure, using the Mirai Crystal and PreHeart to transform into Cure Yell and defeat the Oshimaida.