Time Bokan Series: Time Patroltai Otasukeman

Atasha, Sekobitchi, and Duwarusuki work as members of the Time Patrol, supposedly protecting history from interference. In secret, however, the trio serve a mysterious master and travel through time as the Ojamaman, sabotaging famous events so the past can be reshaped to suit his ambitions.

Two fellow patrollers, Hikaru and Nana, are hiding identities of their own. As the Otasukeman, they race across history to undo the villains' schemes and preserve the proper course of events. Neither side realizes that the enemies ruining their missions are the colleagues standing beside them back at headquarters.