After the battle at the Grand Crevasse, Squad 13 is left by themselves at the ruins of Plantation 13 on standby, with most of their services suspended except for a weekly deliver of supplies and no contact from Hachi and Nana and all, forcing the Parasites to do all the house chores by themselves. Despite their new responsibilities and hardships, Hiro and the others enjoy their new life together, especially Zero Two who is warmly welcomed back into the Squad. Little they know that their new environment is part of an experiment by Dr. Franxx, who insists that they must live this way for now, while a mysterious girl lies waiting, beside a huge monster.