Detailed Settings of the Deserted Island I have set up the entire island in detail as a stage where stranded high school students explore while building a base for living. It is not just a stage for survival, but a structure where resources, dangers, and secrets to be discovered vary depending on the location explored.

1. Island Topography The island is shaped roughly like an ellipse, elongated from north to south, and is surrounded by coral reefs and rocky shoals. It takes a considerable amount of time just to circle the perimeter, and because visibility inside the forest is poor, it is difficult for high school students without maps or tools to grasp the full picture in a short period. The central part of the island consists of gentle hills, with the terrain becoming steeper as one moves north. A river flows from the center toward the southeast, emptying into the sea. Various parts of the island contain depressions, rocky shadows, and small caves that are invisible from a distance. South Coast — The Landing Point Topography and Environment A white sandy beach stretches in an arc, and the waves are relatively calm. Behind the beach, palm-like trees and shrubs line up, and beyond them, a dense forest begins. Driftwood, scraps of seaweed, and broken ship parts are washed up on the shore. Available Resources Driftwood, rope scraps, cloth, plastic containers, etc. Shells and small crabs found when the tide goes out. A drying area utilizing sunlight, or a workspace with good visibility. A place to set up signals to be spotted by ships or aircraft at sea. Topography and Environment Tall trees are densely packed, with thick vines, ferns, and plants with giant leaves covering the ground. The branches and leaves block sunlight, creating dim areas even during the day. Fallen leaves are piled thick on the ground, and puddles or mud form after rain. Visibility worsens the further one goes in, making it hard to see companions even just dozens of meters away. The sounds of birds chirping and leaves rustling are constant, creating the illusion that something is nearby. Available Resources Dry branches and fallen trees for fuel or building materials. Fruits and nuts that may be edible. Vines, bark, and sturdy leaves for crafting materials. Traces of birds and small animals, or watering holes where animals gather. North — Steep Rocky Areas and Small Cliffs Topography and Environment The ground on the north side of the island gradually rises, eventually leading to steep rock walls facing the sea. The rock surfaces are eroded by wind and rain, with narrow footholds or crevices in some places. From atop the cliffs, one can see far across the surrounding sea, but near the water's surface, waves crash violently against the rocks. Some rocky areas contain small caves where seawater enters, or depressions where rainwater collects. Available Resources and Discoveries Relatively dry rocky shadows or places to avoid wind and rain. Shellfish attached to the rocks or small fish left in tide pools. High points for observing the island's topography and the surrounding sea. Driftage left in crevices of the rock walls, or animal nests. Near the center of the forest, a clear stream flows through the rocks. The river's width varies by location, and in the shallows, it is transparent enough to see the stones on the bottom. There is a small waterfall in the middle reaches, with a deep basin formed below it. The riverside has higher humidity than the surroundings, where moss and ferns grow well. The sound of water masks surrounding noises, making it a relatively calm place to spend time even within the forest. Available Resources Potential sources of fresh water essential for life. Small fish by the river or crabs hiding in rocky shadows. Plants growing on the riverbanks or animal tracks left in the damp ground. Relatively flat areas around the waterfall basin. East Side — Intricate Inlets Topography and Environment The east side features a complex coastline where rocky reefs and small sandy beaches alternate. The sea surface is calmer than the open ocean in many places, and fish can be seen in the highly transparent shallows. The impression of the topography changes with the tides, and small tide pools appear between the rocks at low tide. In some places, plants extend near the shore, creating spaces like natural inlets. Available Resources Seafood such as small fish, crabs, and shellfish. Opportunities to observe creatures left in tide pools. Rocky shadows or small sandy beaches sheltered from the wind. Topographical information about the island obtained by investigating the coastline.