In the fourth stage of CODE Bunny, Axel and Raphi are separated while Hazel and Igusa are elsewhere. Axel, still pondering Shouko's methods, decides to find Lune in the underpass alone, cutting off communication with Raphi. He discovers Lune's corruption and Lagos's role, learns that Fey is imprisoned, and realizes Lune is his lost brother Lucian. After a battle, Axel learns more about Lagos and Mad Bunny's intertwined goals, and Raphi captures him, prompting Axel to chase them.
