. However, the local male population has suffered from genetic deterioration due to generations of endogamy (inbreeding), leading to a crisis where the women can no longer successfully conceive. Seiichi is brought to the island to serve as the "head inseminator" to help restore the population's genetic health. The Movie Database Key Characters Seiichi Ozaki
: Konomi’s younger sister, completing the core family unit involved with the protagonist. Media Adaptations and Formats koumi-jima shuu 7 de umeru