30 Years Have Passed Since the Prologue

By the same studio who brought us {<The Extra’s Academy Survival Guide>, <I Killed an Academy Player>} I transmigrated into a world I had never seen before. Believing it was a classic fantasy RPG, I spent thirty years grinding on the battlefield. After becoming a celebrated war hero, I officially retired, ready to finally trigger the ending and enjoy my peace. You're telling me those last thirty grueling years were just the prologue?! And on top of that, the real genre is an academy series?!