Cage of Eden Vol. 19 (Kodansha, 2015)

In order to save their sick teacher, Sengoku and the gang commence an alloutwar to kidnap the island's only doctor, Nishikiori. However, the atrocious doctor uses his brainwashed servants to turn things around on Sengoku and his friends! The kids must think of an even better plan to outwit him, but will they make it in time? As they approach the pyramid for their final strike, the members of Sengoku's camp must once again take a stand against the nefarious cruelty of Nishikiori and his henchmen…