I opened my eyes... and I was the boss of a prison cell?! I've been transported into a novel... but, excuse me. What am I supposed to do when I've been sent here 10 years before the original story even starts?
The setting is a prison. The problem is, this place is worse than the jungle!
After struggling and surviving for 10 years, I became...
the boss of the prison.
"Hey, Mint. Knock it off. Seriously."
"I have no idea what you're talking about, sir."

I'd become a nonchalant, delinquent leader. But that's fine by me. It's the privilege of being a veteran.
"I'll have you declared dead on paper. In exchange, you have to do a job for me.""I have no idea what you mean, sir."
Then, an unbelievable opportunity arrived.
"Help me, and I'll let you out."
"What shall I do for you, Master?"
"..."The head of the prison gave an order to me, the psycho of the cellblock.
"The new rookie who's about to arrive—make him the leader of this prison."
They call it a prison, but it's a lawless land. If I can make one man the leader of this place, I can finally be free.
"However, the place you need to go is the men's prison."
"...Huh? How am I supposed to go with something I don't have?"
"With a disguise, a disguise!"
But, oh dear... Who knew the new rookie would be the original male lead?