Ep. 4: Thunderoad loses a stone to a bomb-laden roomba while Noriko reveals group history.

4

Noriko assists Nozomi’s group by recounting Always Comima’s history, while Thunderoad regrets buying a life-sized Rick model and returns a stone to Kuranoske before accidentally dropping it off a bridge into a roomba. Thunderoad asks Noriko and Nozomi for help retrieving the item, but a crisis arises when Takumi’s prank roomba is revealed to contain live explosives. As security recalls all units, Nozomi locates the specific roomba, which attaches to the Rick model. Thunderoad destroys both to prevent an explosion. Later, Noriko confesses that Dynamite Bomber was created to keep Aki with the Knights of the Twin Towers, leading Thunderoad to transfer Best duties to her. Chihaya receives the stone but returns it to Noriko, believing she needs it more.