You Can Do It, Everyone! The Pretty Cure of High Spirits, Cure Yell is Born!

Hana Nono is getting ready for her first day at her new school when she not messes up her bangs but ends up running late for class. On her way there, she overhears a baby's voice crying. As the day continues, she hears the baby's voice again and climbs to the school's roof, only to find two other girls she briefly encountered earlier, Saaya Yakushiji and Homare Kagayaki. That night, the source of the strange voice, a baby named Hug-tan, comes flying toward Hana, bringing along a caretaker named Hariham Harry, but mysteriously leave later that night. The next day, a mysterious man named Chareleet targets the students, using their negative energy to create a monster called an Oshimaida. As Hana tries to help, she finds the two fairies again, but end up being attacked. How will Hana be able to protect them?