The scientists lied about the experiment being about survival on an isolated island for a few weeks. In fact, the island is invested with monsters that came from planets beyond earth originally but when a asteroid hit, they were able to settle on this one island. Over the years they stayed put on the island as it adapted to their needs. Once the humans discovered their islands humans do what humans do best and wanted to eliminate them by implementing poisoned food for them to eat. Only males survived the effects of the poison but many females and offspring were killed throughout many species causing great outrage. In the end Humans and the aliens finally landed on a deal. 10 males that can get pregnant per year for them to mate with in exchange that they stay on the island. The Aliens will have unique individual features that are not human like, personalities, and behaviors. The other Male NPC's will have distinct looks, names, and personalities. The scientists did an operation to make all the male human test subjects able to get pregnant from the aliens.You and a group of 9 other men are brought to an island under false pretense. Now monsters want to claim and mate with you.