Season 1

1999 · 26 episodes

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.

1The Forthcoming TimeStudents train at the Liebe Delta station; tensions and relationships are introduced before disaster strikes.
2Unnecessary ThingsA sabotage incident begins to destabilize the station, causing confusion and mistrust.
3Beyond the Vast SeaThe crisis escalates as the station is dragged toward the dangerous “Sea of Geduld.”
4The Ring of RyviusThe station is destroyed; surviving students escape aboard the hidden spaceship Ryvius, now stranded without adults.
5A Little HarmonyStudents begin forming a fragile society aboard the Ryvius.
6My MomentA coup led by Blue takes control; the Vital Guarder weapon system is discovered.
7The Changing TimesPower struggles deepen as leadership fractures and factions form.
8We Didn't Know AnythingThe crew struggles to understand the ship and their situation.
9Vital GuarderThe giant weapon is activated as external threats emerge.
10Even If You Can't BelieveThe Ryvius is attacked; it fights back but becomes a target of authorities and is forced to flee.
11When the Party's OverAfter a brief celebration, the crew are labeled terrorists; rationing and inequality begin.
12Whereabouts of the FutureThe crew debates their direction and survival strategy.
13If Only to MeetPersonal relationships intensify amid isolation.
14To Be Too ConsciousClass divisions and resentment worsen onboard.
15Swept AwayThe Ryvius drifts further from help; morale declines.
16Deforming WorldThe ship’s internal society becomes increasingly unstable.
17Free OrderAuthority structures begin to collapse.
18IncomprehensibleThe survivors reflect on their failures and misunderstandings.
19Smiling With YouMoments of humanity appear amid growing chaos.
20Things You Can't Give UpIkumi seizes control of the ship using the Vital Guarder, enforcing strict rule.
21We Don't Need TomorrowThe crew becomes divided under harsh leadership.
22In Order to SurviveMartial law intensifies as survival becomes the only priority.
23Torn PastCharacters confront their past actions and guilt.
24Kouji AibaKouji challenges Ikumi’s rule as outside forces close in.
25In Order to Stay as MyselfPersonal identity and choices come to the forefront.
26TomorrowWith the Final battle and resolution, survival comes at a cost. The remaining crew moves toward an uncertain future.

Episodes