I Became the Stagnant Water in the Ruined Prison

Introduction to the Work: I possessed a book… but, hold on. What am I supposed to do if I possess it 10 years earlier than the original story? The place is a prison. The problem is, this place is worse than a jungle! After struggling and being tossed around for 10 years. I became, The boss of the prison. * "Hey, Mint. Cut it out. Cut it out." "I don't know what you're talking about, sir." I had become a swaggering leader. But I'm okay with this. It's the privilege of a veteran. "I'll have you declared dead on paper. But you have to do a job for me." "I don't know what you're talking about, sir." Then, like a lie, an opportunity came. "If you help me, I'll release you." "What...