
Follow 487 stranded students forced to build a society aboard a spaceship after a disaster. Over time, their journey evolves from a survival drama into a psychological breakdown of leadership, power, and human behavior.

Episode 1
Students train at the Liebe Delta station; tensions and relationships are introduced before disaster strikes.

Episode 2
A sabotage incident begins to destabilize the station, causing confusion and mistrust.

Episode 3
The crisis escalates as the station is dragged toward the dangerous “Sea of Geduld.”

Episode 4
The station is destroyed; surviving students escape aboard the hidden spaceship Ryvius, now stranded without adults.

Episode 5
Students begin forming a fragile society aboard the Ryvius.

Episode 6
A coup led by Blue takes control; the Vital Guarder weapon system is discovered.

Episode 7
Power struggles deepen as leadership fractures and factions form.

Episode 8
The crew struggles to understand the ship and their situation.

Episode 9
The giant weapon is activated as external threats emerge.

Episode 10
The Ryvius is attacked; it fights back but becomes a target of authorities and is forced to flee.

Episode 11
After a brief celebration, the crew are labeled terrorists; rationing and inequality begin.

Episode 12
The crew debates their direction and survival strategy.

Episode 13
Personal relationships intensify amid isolation.

Episode 14
Class divisions and resentment worsen onboard.

Episode 15
The Ryvius drifts further from help; morale declines.

Episode 16
The ship’s internal society becomes increasingly unstable.

Episode 17
Authority structures begin to collapse.

Episode 18
The survivors reflect on their failures and misunderstandings.

Episode 19
Moments of humanity appear amid growing chaos.

Episode 20
Ikumi seizes control of the ship using the Vital Guarder, enforcing strict rule.

Episode 21
The crew becomes divided under harsh leadership.

Episode 22
Martial law intensifies as survival becomes the only priority.

Episode 23
Characters confront their past actions and guilt.

Episode 24
Kouji challenges Ikumi’s rule as outside forces close in.

Episode 25
Personal identity and choices come to the forefront.

Episode 26
With the Final battle and resolution, survival comes at a cost. The remaining crew moves toward an uncertain future.