From Surgipelago, the Beach Surgery encyclopedia
The Rocket Cart (volume)
This article describes the thirteenth collected volume of A Complicated Surgery Will Take Place on the Beach Tonight (manga). The leather surplus has generated extensive fandom debate; see The Leather Calculation for scholarly readings.
In a cabin at the edge of the desert interior, Leif constructs a vehicle from rusted metal and salvage—wheels, axle, tilted wooden frame—methodically, without haste. Simultaneously, Katita stitches armour: a full suit of treated leather, reinforced along shoulders and spine, seams precise. As she works, she discovers something unsettling: bundled in the cabin's corner is leather. Enough for a suit. Then another. Then a dozen.
The implications ripple unspoken through the cabin: the cycle does not begin and end. It *recurses*. The cabin has been visited, reconstructed, dozens of times before.
Katita: Come on. Come on.— Volume 13, final page—no panel dialogue; only the cart's motion.
On the final pages, they load the rocket cart and begin their ride toward the city mouth at sunrise. The pressure in Leif's shoulder blades intensifies. Wind rises. And then—feathers. White wings.
This volume marks the resolution of all three of Leif's temporary injuries: he walks (on the cart), he sees (clearly now), the pacemaker removed. What arrives instead is not salvation but Icarus—wings that carry briefly, then fail. Each loop, the leather is already stitched. Each loop, he falls. Theses on the Grand Inquisitor motif treat this volume's surplus leather as the final trap: the evidence that refusal is impossible, because the cycle has already decided, a dozen times over.