Norn lands to welcome a new female member, but the mysterious girl Kakeru finds doesn't remember her name. Despite this, she's warmly welcomed by the others aboard the ship.

Norn is attacked by people seeking to capture and use members of the crew. When the enemy turns its weapons on the ship, Koharu releases her devastating ability to save them.

Everything changed when Koharu joined the crew of Norn. The sins of the past forge an uncertain future and put the fate of the crew, and the world itself, in the balance.

Following Sakuya’s vision of the near future, the crew hurries to rescue Koharu and Mikoto. On the island, Kakeru runs into Natsuhiko and Ron.

The group is finally reunited aboard the ship. The Reset weighs heavily on their minds, and Koharu fears the inevitable global consequences of their decision.