GTO Paradise Lost Vol. 20 (Kodansha, 2023)

The bold, the powerful, the almighty-and they're surrounding him on all sides! How's he gonna fight and defeat them? That's what Onizuka's trying to figure out as his training begins! After finding himself completely helpless against Saburo and his pseudo-cyborg body, Onizuka sets off on a training journey to defeat this gorilla-like villain. Meanwhile, Nana's still unconscious, so subbing in for her and Onizuka in Class G is...none other than Fuyutsuki-sensei! Is the era of Great Teacher Fuyutsuki about to kick off?! It's time to get to work!