The 3 Days I Spent Piston Fucking My Student Who Got Me Fired With False Charges. Hikaru Minazuki (2021)

Sinopsis

Fattie used to be a decent teacher but he was accused falsely by a malicious student girl called Hikaru Minazuki. After he got fired from his teaching job, he also got fired up and decided it was time for righteous revenge. Then, Fat doofus spent 3 days destroying Hikaru Minazuki.