For the uninitiated, 'Koumi-jima Shuu 7 de Umeru Mesu-' is an anime series produced by the renowned studio, MAPPA. Adapted from the Japanese light novel series of the same name, the show follows the story of a group of high school students living on the remote island of Koumi-jima. The setting provides an isolated backdrop for the characters to navigate their relationships, personal growth, and the complexities of adolescence.
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If you are starting the series, here is the general arc structure: For the uninitiated, 'Koumi-jima Shuu 7 de Umeru