If Zero Zero Goes Back to the Past

For a secret mission, Fangtani Reiichi, who almost died in the flames of the organization's experimental base, accidentally returned to the police academy. Is it an illusion, the past, or a parallel world? In any case, senior undercover Jiang Guling, who has eight years of information gap, decided to take the organizational direction of this world into his own hands. Motto: Don't give up if you have an advantage