Ichinose Jiro and Honma Kai starts off as roommates at the police academy at Katanozaka campus. The classes are taught by Katanozaka Yuzuru, who at one point was an excellent criminal profiler, but got demoted due to speaking out against his superiors. His assistant is Oikawa Ranko, a strict and hard-ass instructor.

Jiro and Kai are finally allowed to leave the academy on the weekend and the first thing they do is… set up a double date! However, the girls they found on a dating app never shows up and as they find other girls to hit on, they witness a kidnapping!

Jiro and Kai managed to outrun both a group of thugs and their car… to reach a police officer, who helped them contact their instructor. They took their instructor and another detective to the scene but there was nothing left. According to the instructor, there’s nothing else to do but leave things to the headquarter. Jiro and Kai, however, can’t just sit still and do nothing…

Kai and Jiro’s classmate, Sayaka, is having a hard time keeping up with the police academy and she posts online that she “wants to die”. A man who goes by Yubitomo Yubisuke reaches out to her and offers to listen to her problems. She agrees to meet him but…

On Kai and Jiro’s first day out after their probation period, they show up at a club in the middle of a drug bust. Later, they learn that the police is chasing after the ringleader of the drug dealers, who also turns out to be Jiro’s childhood friend. The police asks Jiro and Kai for help, and thus they go on their first undercover mission.

The case that caused Detective Katanozaka to become a police academy instructor is finally revealed… And of course, Kai and Jiro are caught up in it again. They get taken hostage inside the police academy building.

Jiro and Kai decides they’re going to help the Tenma siblings prove their father’s innocence. Jiro is allowed to leave the room in exchange for the new SAT member who arrived. Upon hearing Jiro’s plan, Takanozaka volunteers to become a hostage so he can go into the classroom and brainstorm with Kai.

Jiro and Kai have finally started their on-site training! They are dispatched to South Kanagawa Koban (neighborhood police station) and… immediately put into a room to do nothing. Unbeknownst to them, Yanagida had called ahead and told the police officers to keep a tight watch on Jiro and Kai! However, of course, the two troublemakers find a way out of there and in the middle of another tricky case.

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