Zenmon no Tora Koumon no Okami

From Fantasyshrine:

Lacking in polities, the more than capable Captain Jotetsu was never promoted. One day, while on his mission of conquering the mountain thieves led by Rou (wolf) and Rekko (fiery tiger), the supposed conquerer Jotetsu became the conqueree?

NOTE: First 5 chapters done by Desperate Love should be read left to right.