Humanity stands on the edge of extinction due to the rise of the Incubi, supernatural creatures that capture humans for breeding purposes, and the only ones capable of opposing these foes are the Witches, magical girls empowered by otherworldly beings. High school student Renka Azuma is one of these girls; her alternate persona is Silver Lotus, a magical girl who commands a multitude of insects to battle the Incubi relentlessly. One day, Silver Lotus comes to the aid of a fellow Witch, a rookie named Azure Nova, during an Incubi assault. This encounter with her self-proclaimed admirer brings a shift to Silver Lotuss typically solitary existence?! Thus begins a dark fantasy centered on an unconventional magical girl who directs insects to consume monsters!