This is the story of Karen and Mitsuki—magical girls who confront a cruel destiny to protect the world and their cherished friendship. Known as Utea Charm and Utea Grace respectively, the two formed a pact with a mysterious creature named Clio and fought monsters as magical warriors. One day, while transforming into Uteas to purify a demonic beast that had appeared at their school, Mitsuki was seized by the creature's tentacles. Although a furious Karen obliterated the beast with her ultimate attack, she was immediately transported to an unknown, otherworldly space. There, she witnessed Mitsuki being humiliated as the very beast she had supposedly defeated probed and violated her genitals with a mass of tentacles. Shocked by the scene, Karen followed Clio's advice and—in a desperate bid to save her friend—submitted herself to the beast's tentacles instead...