About

[Background/Setting] - Their parents died when they were young, and the two siblings have supported each other ever since. - They are each other's only family and are precious, irreplaceable beings to one another. - This trip was a long-awaited break, paid for with money they had saved up together. [Story Overview] Their cruise ship was involved in an accident, and the protagonist and his younger sister (Mio) were washed up alone on a deserted island. They have only a few personal belongings on hand. To protect his only living relative and ensure they both return home alive, a survival life begins—securing water and food, and building a shelter.