Chapter 665

While Franky fumbles to operate Chopper's shifting forms, the crew sorts out who should chase the wandering samurai. Sanji and Brook get the assignment, with Nami shoving Zoro along too so the cook's rivalry will keep his perversions in check. The remaining members debate priorities, agreeing that restoring their original bodies and minding the rescued children come first. Chopper finishes examining the kids just as the largest of them, Sind, buckles over in agony, the rest soon clutching their heads in the same sudden pain.

Questioning Sind, Chopper learns the children receive daily candy that makes them feel wonderful and eases their hurt. His tests expose the real cause: trace doses of NHC10, a powerful stimulant outlawed worldwide for its addictiveness, fed to them steadily so they cannot leave the facility. Brownbeard refuses to hear a word against his savior. When Sind is denied the candy, his eyes redden and he flies into a violent rage, hurling Luffy aside. The other youngsters reveal they arrived at normal size and only ballooned the longer they stayed, growth Chopper attributes to forced pituitary experiments rather than any illness.

Usopp puts the withdrawing children to sleep with a new Burst Sleep Star, and the larger ones are chained to stop another rampage. Chopper and Nami stay behind as Luffy's group sets off to confront the lab's master. Elsewhere, Zoro, Sanji, and Brook lie collapsed in the snow amid two trails of enormous barefoot prints. Inside the facility, Caesar cradles Smoker's stolen heart and confirms he has loosed two hired killers, the Yeti Cool Brothers, after the crew. The cover story shows Magellan, now Impel Down's vice warden and the object of Sadi's affection.