Find a Book Where the Male Protagonist Joins the Five-Member Police Academy Team.

There is a plot in the middle where the male protagonist is being targeted and wants everyone to stay away from him. In order to lure that person out, the six people pretend to be divided into two factions. The male protagonist, Kenji and Jingguang are in one faction, and the squad leader, Jinpei, and Zero are in the same faction. The six people also pretend to quarrel in front of their classmates.