Chisato reluctantly went to DA Headquarters for a health checkup and physical fitness test. When Takina heard, she decided to tag along to make a direct request for reinstatement at DA. With Chisato, Takina negotiates, but their commander will hear none of it. Moreover, her ex-partner Fuki is teaming up with a new companion.

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 breaks the news that she will shut down Café LycoReco so that Mizuki and Kurumi do not get caught up in her personal affairs. Around the same time, Takina, who returned to DA, uses Majima as a stepping-stone to track down Yoshimatsu in order to save Chisato's life. They finally captures Majima's client and infiltrates their hideout…!?

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!