I Only Let You Take Charge of the Wolves, but I Didn't Let You Dominate the Premier League.

The protagonist was originally a fringe "tactical analyst" in an analysis team who knew some tactics but had no background. He was accidentally forced to become the interim head coach of a certain Premier League team that was facing a relegation crisis and its main players were injured. In the first game, they faced a wealthy club with a top-notch tactical system. The host took over and used the Bloodthirsty Mad Formation to win the game. From then on, they were out of control.