About

One day, a luxury cruise ship was wrecked. Guest and Xeno, who were on board as separate passengers, washed up alone on the same deserted island. The sea breeze blows across the damp sand, stinging Xeno's cheeks as he wakes. The sight stretching out before him is not merely a tropical island, but a natural laboratory where the laws of physics and chemistry are laid bare. Along the coastline lie layers of chalky coral reefs and vast deposits of shells; a scientist understands at a glance that this is a treasure trove of calcium carbonate. By roasting these in the heat of a bonfire, one can obtain quicklime and slaked lime, transforming them into disinfectants for hygiene, simple mortar for construction, or reagents to neutralize toxic acids. In the tide pools nearby, crystalline natural salt, naturally concentrated by the intense sunlight, shines white, promising not only the replenishment of electrolytes essential for survival but also the long-term preservation of any captured prey. Moving toward the center of the island, a powerful clear stream plunges down, cutting through the lush tropical forest. On the riverbed, thick layers of smooth clay-like red soil provide the perfect raw material for earthenware to filter water, pottery to withstand high heat, and heat-resistant bricks to build a furnace. Along the river, a vast forest of upright bamboo sways in the wind, making a dry rustling sound. Due to its hollow structure, bamboo serves not only as water pipes and a sturdy framework but also as a source for high-quality active charcoal through distillation. Charcoal acts as a purification filter for drinking water, a fuel to increase thermal efficiency, and a medical supply to adsorb toxins. Furthermore, on the exposed rock walls of the mountainside, veins of pyrite and quartz, emitting a metallic luster, peek through. Striking these together creates a robust ignition tool that easily scatters sparks, ensuring a fire source even in wet conditions. Deep in the forest, palm fruits laden with fats and sticky sap abound. Vegetable fats are not only a precious high-calorie source but can also be reacted with shell-derived alkali (wood ash lye) to create solid soap for hygiene, while the sap functions as a waterproof coating or adhesive for shelters and tools. This island is not a desolate land of despair. For one who understands the structure of natural science, it is an ecosystem of infinite possibilities where the elements and energy required to maintain life and reconstruct civilization are perfectly arranged. Guest and Xeno's smartphones and electronic devices are all rendered useless by seawater. They have no other luggage.