Tetsu Shiratori
as Kouji Aiba
An act of sabotage has sent a space station plummeting towards a dangerous phenomena known as the Sea of Geduld. With only hours to spare before the collapse of the entire station, a group of teens, training on-board the ship will seek safety aboard the Ryvius, an interstellar spacecraft hidden deep inside the station. With the adult crew and instructors dead, these young astronauts must rely on their training, courage and most importantly each other to prepare for the journey home.
Tetsu Shiratori
as Kouji Aiba
Houko Kuwashima
as Aoi Housen
Soichiro Hoshi
as Yuki Aiba
Tomokazu Seki
as Ikumi Oze
Sakura Tange
as Kozue Izumi
Rikako Aikawa
as Fina S. Shinozaki
Rei Sakuma
as Neya
Nobuyuki Hiyama
as Airs Blue
Hisao Egawa
as Fuu Nam Chai
Naomi Nagasawa
as Criff Cay
Yui Horie
as Michelle Cay
Bin Shimada
as Lucson Houjou
Isshin Chiba
as Stein Heigar
Toshiharu Sakurai
as Charlie (Good Turtleland III)
Omi Minami
as Carabona Guinea
Megumi Toyoguchi
as Ran Luckmolde
Omi Minami
as Pat Campbell
Hisao Egawa
as Brian Brabb, Jr.
Soichiro Hoshi
as Kevin Green
Koichi Tochika
as Chic Kraat
Kyoko Hikami
as Cullen Lucciora
Kyoko Hikami
as Juli Bahana
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.