The client this time is Matsushita, a man whose body is connected to a machine. Knowing his time is short, Matsushita returns to his homeland of Japan for some sightseeing. Chisato and Takina, who were requested as bodyguards and guides, go all out to support Matsushita's Tokyo sightseeing tour! Meanwhile, Takina learns a curious fact about Chisato!?

After learning that Café LycoReco is in the red, Takina decides to take charge of accounting on her own. Takina flawlessly breaks down everything from indiscriminately restraining Chisato from wasting bullets to shadowing the café's members. She even goes as far as planning a new menu item. But the menu item has a shape that’s too terrible to put into words!?

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!?

All is settled with the incident at Enkuboku—or so it seems until Majima, who should have been defeated at the old Radio Tower, reappears before Chisato. Majima planted a bomb in the Enkuboku, betting on the explosion when he challenges Chisato to a one-on-one fight. As Chisato's own time limit approaches, the final battle begins!