Hana Nono, a 13-year-old who wants to be seen as a grown-up, dependable big-sister type, is starting middle school in Hagukumi City when a strange baby named Hugtan and a hamster-like fairy named Harry fall from the sky. The pair are being chased by the Criasu Corporation, a company from the future that wants the power of Hugtan's Mirai Crystal to bend the present to its needs. Hana's wish to protect Hugtan gives her a Mirai Crystal of her own, and she transforms into Cure Yell, the Pretty Cure of High Spirits. This manga adapts the anime series of the same name.