A Tribe's Only Hope

AU. After waking up in an unfamiliar place, Natsu discovers from his abductor, or rather abductors, that his father had promised them that he would be the one to save their tribe from being wiped out of existence. The only way to prevent that from happening was for Natsu to ensure that they all give birth to the next generation of the tribe. Natsu X Massive Harem lemon story!