Cocona is a seemingly ordinary middle school student living a normal life with her grandmother. As she ponders over what future career she should take up, she meets an energetic yet eccentric girl named Papika, who immediately takes an interest in Cocona. Without hesitation, she drags her into an organization called Flip Flap.
This organization specializes in retrieving mysterious, amorphous fragments which are said to grant wishes from various alternate dimensions known as Pure Illusion. After completing their first mission, Cocona and Papika are immediately sent to another world in Pure Illusion. As a dangerous creature stalks them, they use their shards to transform into magical girls, Cocona into Pure Blade and Papika into Pure Barrier.
However, as they try to defeat the creature standing before them, three other magical girls from a rival organization barge in and slay the creature, later taking out an amorphous fragment left in its body. Realizing the potential rivalry between them and the rival organization and creatures living in Pure Illusion, Cocona and Papika must learn to work together and synchronize their feelings so that they can transform more effectively.