Queue #24 · Sequel to Kūro Kaiun
Futari ふたり
Two people. One ship. Infinite space.
Ren and Sora merge their ships into the 白殻 Shirakara (White Shell) — forty square meters of pressurized metal, nowhere to go but here. A cozy first-person survival game about two guarded people learning each other's language across cargo runs, crises, shared meals, and long silences.
40 m² · Shirakara · generational arc
Inspired by My Happy Marriage
Central truth
The ship is the protagonist
Ren and Sora are not the protagonists — the Shirakara is. They will grow old. They will die. The ship will not. Every repair is legacy. Every logbook entry is a letter to someone unborn. When children take over the controls and Tetsumaru plots a new course, survival becomes an act of love across time.
"They will grow old. They will die. The ship will not."
Relationship
Asymmetric love languages
Sora receives trust through action and memory. Ren receives trust through presence and space. You learn her language the same way Ren does — through attention and time.
Dual needs meters (never shown as numbers), hidden trust expressed through Sora's behavior and robot moods, and a harmony system that drives ship world state — systems degrade when the relationship does.
Survival
Cooperation required
Full survival loop — air, power, heat, hull, food — all requiring two people with different needs working together inside one narrow hull.
GenerationalTimeManager: route time → seasons → years → generational transition. ShipHistorySystem: visible marks, objects, wear — the ship readable as a life.
Win states
- Grown Old Together
- The Family — child joins, third bunk appears, game changes
- The Partnership
- Bittersweet
Fail states
- Ship dies
- One person dies
- One person leaves — slow trust drift, no dramatic fight; the hardest fail
The ending: no cutscene of death. The ship, running. New hands at the controls. Tetsumaru's database intact with forty years of routes. Akari makes the same ramen for people who don't know whose recipes these are yet.
Continuity
Save import from Kūro Kaiun
Reads Kūro Kaiun saves — Tetsumaru references past routes by name, the Karasu logbook appears in storage half-unpacked, Akari remembers the first tea she made for Sora.
GDD v0.2: C:\github\Futari\GDD.md · Dev estimate 12–16 weeks part-time post-Kūro Kaiun · DLC stack planned (Hard Routes, Repair Deep, Robotic Pests, Robot Invasion, Computer Virus).
