1. The Forthcoming Time

Students train at the Liebe Delta station; tensions and relationships are introduced before disaster strikes.

2. Unnecessary Things

A sabotage incident begins to destabilize the station, causing confusion and mistrust.

3. Beyond the Vast Sea

The crisis escalates as the station is dragged toward the dangerous “Sea of Geduld.”

4. The Ring of Ryvius

The station is destroyed; surviving students escape aboard the hidden spaceship Ryvius, now stranded without adults.

5. A Little Harmony

Students begin forming a fragile society aboard the Ryvius.

6. My Moment

A coup led by Blue takes control; the Vital Guarder weapon system is discovered.

7. The Changing Times

Power struggles deepen as leadership fractures and factions form.

8. We Didn't Know Anything

The crew struggles to understand the ship and their situation.

9. Vital Guarder

The giant weapon is activated as external threats emerge.

10. Even If You Can't Believe

The Ryvius is attacked; it fights back but becomes a target of authorities and is forced to flee.

11. When the Party's Over

After a brief celebration, the crew are labeled terrorists; rationing and inequality begin.

12. Whereabouts of the Future

The crew debates their direction and survival strategy.

13. If Only to Meet

Personal relationships intensify amid isolation.

14. To Be Too Conscious

Class divisions and resentment worsen onboard.

15. Swept Away

The Ryvius drifts further from help; morale declines.

16. Deforming World

The ship’s internal society becomes increasingly unstable.

17. Free Order

Authority structures begin to collapse.

18. Incomprehensible

The survivors reflect on their failures and misunderstandings.

19. Smiling With You

Moments of humanity appear amid growing chaos.

20. Things You Can't Give Up

Ikumi seizes control of the ship using the Vital Guarder, enforcing strict rule.

22. In Order to Survive

Martial law intensifies as survival becomes the only priority.

23. Torn Past

Characters confront their past actions and guilt.

24. Kouji Aiba

Kouji challenges Ikumi’s rule as outside forces close in.

25. In Order to Stay as Myself

Personal identity and choices come to the forefront.

26. Tomorrow

With the Final battle and resolution, survival comes at a cost. The remaining crew moves toward an uncertain future.