[Mind games and fights] + [The heroine suffers, but the ending isn't tragic] + [Survival without mindless self-interest] + [The story heats up after Chapter 40] + [Not too long, but a complete story. Enjoy!]
A One Piece fan transmigrates into Ace and, in a bid to survive, volunteers to join the Marines.
Unexpectedly, he runs into resistance at every turn.
Sengoku, who looks so mild-mannered, actually goes to every length to sabotage him!
And so, a fight for survival unfolds in Impel Down.
