While lying on the floor in the classroom, Nagara is approached by Nozomi, who removes a feather that was on his head. She wonders if its fun lying on the floor all the time and he confirms.
Nagara, Nozomi, Asakaze, and Rajdhani continue searching for new worlds. Students start going missing, and their bodies are found "frozen" into black shells, so Pony asks Mizuho to look into the matter.
Nagara and Rajdhani arrive in a world called "Filmmaker," and discover a movie filmed entirely from Nagara's POV. Mizuho discovers a stray dog by the name of Yamabiko, claiming to be another castaway who attended the same school.
Having learned the truth about This World, groups led by Ms. Aki and Hoshi prepare to go their separate ways. Nagara finds himself in an upside-down world he cannot freely leave, and is forced to work on building a Tower of Babel,
While traveling the wilderness, Mizuho asks Yamabiko how he became a dog. Yamabiko then relates how, 5000 years ago, he wandered different worlds all alone, until meeting a girl to whom he gradually opened his heart.
Kossetsu reads the minds of others passing by in a train station world using her true power. She pines for Asakaze, knowing that he is interested in Nozomi, and that Nozomi is the only one who can change him.
After learning of Nozomi's death from Kossetsu's letter, Nagara and Mizuho hold a memorial service for her. While advancing the project to return home, they are visited by an old friend.
Nagara attends the opening ceremony of his technical school, but feels out of place. He recalls what happened after blasting off into space, questioning if he ever really went adrift.
