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

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

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

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

Students begin forming a fragile society aboard the Ryvius.

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

Power struggles deepen as leadership fractures and factions form.

The crew struggles to understand the ship and their situation.

The giant weapon is activated as external threats emerge.

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

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

The crew debates their direction and survival strategy.

Personal relationships intensify amid isolation.

Class divisions and resentment worsen onboard.

The Ryvius drifts further from help; morale declines.

The ship’s internal society becomes increasingly unstable.

Authority structures begin to collapse.

The survivors reflect on their failures and misunderstandings.

Moments of humanity appear amid growing chaos.

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

The crew becomes divided under harsh leadership.

Martial law intensifies as survival becomes the only priority.

Characters confront their past actions and guilt.

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

Personal identity and choices come to the forefront.

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