An outbreak of serial attacks against Lycoris occur. In order to stay in groups, Takina decides to stay over at Chisato's house. But for these two, living with someone for the first time is full of unpredictable situations!? Meanwhile, Kurumi secretly searches through the information DA is holding and gets close to the surprising truths about the assaults on Lycoris.

Chisato's artificial heart was targeted. Now that the battery can no longer be charged, the remainder of Chisato's days are set. Kurumi, who chases down clues about the irreplaceable artificial heart, asks Mika about what happened back then. Meanwhile, Chisato is summoned to Headquarters as DA prepares for a large-scale operation to suppress Majima.

Chisato is dragged into a tough fight against Majima at the old radio tower, but Takina rushes in just in the nick of time. Meanwhile, the existence of the Lycoris is exposed to the public due to Majima's ploy. At Headquarters, Kusunoki's command is stripped, and a decision is made to dispose of the Lycoris inside the Enkuboku!?