Episodes
1. Frost Descends
Team Summer A banishes Ango and Ryo as Haru and the others mourn the missing Hana. Aramaki leaves the settlement believing she is still alive.
2. Summer Begins
Expecting a trap, Ango and Ryo find and observe Team Summer B, but they are unexpectedly welcomed by the easygoing group.
3. Grain in Ear
The two newcomers help Team Summer B. As they get to know the group, Ryo doubts their ability to survive. Ango begins to see Natsu as Shigeru.
4. Autumnal Equinox
The carefree group enjoys life at sea, but Ryo tests their survival skills. Natsu reveals that Team Summer B is for dropouts, angering Ango.
5. Vernal Equinox
Suspicious, Botan searches Ryo and Ango's belongings while the others look for Arashi. Elsewhere, another survivor learns about the wilderness.
6. White Dew
Team Summer B gets stuck in a bed of dense algae. they find a large ship and investigate, but Botan is wary. Stranded, Arashi sees the ship's kite.
7. Winter Begins
The team members are separated after the ship's sudden movement. Arashi makes his way to help as Botan's group makes a discovery.
8. Lesser Cold
Ango's hallucinations lead to perilous situations for him and Arashi. Semimaru has a brush with death while Natsu gathers her courage.
9. Grain Full
A sanctuary in nature becomes a trap for small mammals and humans alike. Meanwhile, an iron-eating bacteria begins to spread throughout the ship.
10. Rain Water
Fujiko and Chisa reunite with Hana. On the ship, the missiles begin launch prep while Team Summer B learns about Ango's past and the test.
11. Greater Cold
Hana readjusts to other humans. Team Summer B works together to manually disable the missiles, but a series of passcodes complicates the process.
12. Pure Brightness
Problems persist in the ship as the spreading bacteria begins attacking. The missile countdown continues as the team makes a mad dash to exit.
