The story of the TV anime third season begins as Kira-juku, where Mirai and other main charcaters live, is turned into "Pri☆Chan Land," a VR (Virtual) amusement park. Furthermore, Eve, a mysterious girl who is the president of Kagayaki Corporation that operates the park, announces to hold "Princess Cup," a competition to choose the next generation top Pri☆chan idols. Using the new item "Pritama Go" to train their mascots, Mirai and others will work together to win the tournament and to become the "Illuminage Queen."
Source: Crunchyroll