After an argument with his father, 14-year-old Ikuto Tōhōin runs away from home and out to sea, only for a massive storm to send him adrift and eventually strand him on an uncharted tropical island named Airantou. Half-drowned, he is found by a kindhearted but naive girl named Suzu, who (clumsily) resuscitates him and takes him into her care. Soon after, Ikuto learns that Airantou was settled 130 years ago by a group of Japanese that had been shipwrecked during a voyage to Europe. Though their Meiji-era village survived and prospered to modern day, its entire male population was claimed by a rogue wave during a fishing tournament some twelve years before. As a result, nearly every girl of Suzu's generation is desperate for a husband, and immediately latches onto Ikuto as a prime candidate; to his dismay, their attentions quickly erupt into violent competition, forcing Suzu to protect him. At first eager to escape the island (and stymied only by the quasi-magical whirlpools surrounding the entire coast), Ikuto eventually settles into his new life with Suzu, befriending her as well as many of the other girls pursuing his hand. Together, they engage in countless mishaps and adventures, heartily encouraged by not only the village matriarch - Suzu's grandmother - but the increasingly large cast of anthropomorphic animals and Youkai that also call Airantou home.
