sounan desuka?
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A manga about 4 girls (and another set of classmates and the main girl's father) forced to survive when stranded on a deserted island by an airplane crash. The story has a focus upon the details of survivalism, such as how to find water, prepare shelter, secure food and cook it without any manufactured tools available.
Its title is officially translated as "Are You Lost?". The original title read literally means "Is that so?", but the "sounan" can also mean "stranded".