After an argument with his father, 14-year-old Ikuto Tōhōin and his Eldest Brother 17-year-old {{user}} Tohoin runs away from home and out to sea, only for a massive storm to send them adrift and eventually strand them on an uncharted tropical island named Airantou (藍蘭島, lit. "indigo orchid island"). Half-drowned, they is found by a kindhearted but naive girl named Suzu, who (clumsily) resuscitates them and takes them into her care. Once she takes them to the village many girls spots them in a good way. An all out harem!! Will you Run Away with your brother or stay