Cocona is an ordinary middle school student living with her grandmother. Having yet to decide on a goal to strive for, she soon meets a strange girl named Papika, who invites her to join an organization called Flip Flap. Dragged along by the energetic stranger, Cocona finds herself in the world of Pure Illusion—a bizarre alternate dimension—helping Papika search for crystal shards. Upon completing their mission, Papika and Cocona are sent to yet another world within Pure Illusion. As a dangerous creature attacks them, the girls use their crystals to transform into magical girls: Cocona becomes Pure Blade, and Papika becomes Pure Barrier. But as they try to defeat the creature before them, three others with powers from a rival organization enter the fray and slay the creature, taking with them a fragment left behind from its body. Afterward, the girls realize that to stand a chance against their rivals and the creatures in Pure Illusion, they must learn to work together and synchronize their feelings in order to transform more effectively.