The F-Rank Officer and His Mecha Girls

This fantasy series follows an officer stuck at the lowest rank, whose standing begins to shift once he teams up with a group of mecha girls. The people who once looked down on him soon discover that the balance of power is changing. As he pushes back against those who wronged him, the story tracks his climb from the bottom toward respect. Mecha battles and fantasy adventure drive a steady run of rising fortunes, retaliation, and reckoning.