Honma and Ichinose, who know nothing, go to a club where detective Maruhashi ans his colleagues set feet to arrest a group of meth dealers. Two people (Kai and Jiro), who say they are police academy students, are asked to look for these guys and help the police arrest them! The picture of the meth dealer shows Jiro's childhood friend, Rinka. Ichinose, who is shocked to learn that Rinka is involved in buying and selling meth, asks the detectives to go undercover and help them. Ichinose and Honma go together to see Rinka. (Source: Hulu)