One Piece, Vol. 16: Carrying On His Will

It has a great background; with its insights on private healthcare & commodification of services leading to ruin. Wapol, who can eat anything, is a not-so-subtle representation of greed, being defeated by Luffy's freedom and replaced with a democratically-elected Dalton. However, the star of the show is Chopper, whose backstory is so heartbreaking it strained me. I nearly made it through, but those fucking cherry blossoms broke open the waterworks.