Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
An armored worm, an incarnation of a mutant worm that destroyed civilization and trampled upon mankind. The only countermeasure against it is Princess Butterfly, a girl who lives an insect that has evolved different from the armored worm. The only countermeasure is Princess Butterfly. Ayumi, who is a candidate for Princess Butterfly, has been labeled as an inferior life, and even though she is in despair, she continues to train every day with the mission of "saving the world." However, after all her efforts, she was waiting for her due to the betrayal of her best friend and the unbearable reality. This is a story of girls who continue to struggle to survive the harsh world even though they are at the mercy of their fate, and to regain the world.