Prologue-eseo 30-nyeoni Heulleotda

프롤로그에서 30년이 흘렀다 / Peurollogeueseo samsip nyeoni heulleotda / 30 Years Have Passed Since the Prologue

I "transmigrated" into a world I'd never seen before. For 30 years, I believed I was living in a classic fantasy RPG. I became a war hero, retired, and thought I was finally about to see the ending. But... Those 30 years were only the prologue. It turns out the real story is about an academy?