Lune - Jutaijima "Doushite Anta Mitai na Busao ni Tanezuke Sarenakya Ikenai no yo?!"

The field trip ship was wrecked in a storm. A couple of schoolgirls and an ugly schoolboy, hated and bullied by them in school, drifted to safety on an uninhabited island. The girls were infected by a strange virus and eventually will die if not cured. The only way for the girls to survive is to be impregnated...