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In a world where the sky is filled with hearts that, when broken, release “thoughts” causing people to lose their sanity, high school girl Tsubame aspires to become a magical girl to protect her best friends, Koko and Rui. On a bus, Tsubame and Koko are exposed to a “thought,” triggering a crisis that awakens Tsubame’s magical girl powers, granted by Koko, who is already a magical girl. Rui, a cyborg magical girl struggling with her abilities, reveals her tragic past and connection to the thoughts’ dangers. Together, the trio faces early battles against these monstrous entities, navigating their powers and personal bonds. Tsubame’s determination to save her friends sets the stage for their fight against a world-threatening phenomenon.
