あらすじ
This world has been invaded by bugs. With the appearance of the "Armored Bugs," mutating insect monsters that can overcome all modern weapons, humanity has been robbed of much of its living space. The only ones who can stand against such adversaries are the "Noble Butterflies," girls who harbor "Insects" that have gone through evolutions differing from the armored bugs. One of the candidates to become a Noble Butterfly, Odamaki Ayumi, still suffers from the fact that she is unable to become one.
あらすじはAniListより（英語）。
