The rest of the story focuses on Squad 13 fighting the klaxosaurs and the relationship between the Parasites in Squad 13. It also focuses on the relationship between Zero Two and Hiro. During the rest of the story, many romantic relationships are started between the characters. Near the end of the story, APE abandons the Parasites. This makes the Parasites begin dying. Zero Two and Hiro eventually go up into space to fight aliens called VIRM. They die in space. The story ends with the Parasites starting families and helping make the Earth back to what it was before. Zero Two and Hiro reincarnate as two children who meet each other.