I have seen many theories and expectations about the story,so i wanted to help with some information around it.
First of all,this game is a spiritual succesor of a previous comic NTRMAN release in 2020 named "Awakening of the goddess",with same setting but it seems like different plot from the game.The comic tell us about an aid worker named Sarah Hayakawa who is married and have a son,she has been helping many tribes for the last years and now is in another mission while her family are in their home,she communicate with them via online with her computer and send emails to her husband,but as time passes things start to get strange,her husband suspects about the villagers,Sarah begins to have weird dreams and a statue gifted to her suddenly change of color, is revealed that the statue represents goddess of fertility Tawaret who gets Sarah possesed,in the end it happen a ritual where the villagers mate with Sarah,the plan was to Tawaret use her like vessel to give birth tribal's offspring and flourish in numbers again,the family find about it but they dont do anything,they lost communication with Sarah and years later the news reveal that she was found married in the tribe,pregnant and given birth already two babies,i can add that in this story some tribal characters were a tribal boy,his mother,village chief and more villagers.
Now about this game,i think NTRMAN liked so much or look into his more popular works so decided to use the same setting for a game,so he starts "Arrival of a goddess",Aotg,but arrival instead of awakening,which is directly connected to tenants of the dead,a game where one day a zombie virus appear so in Aotg the scientists Dr.Claire and her husband ben head to an island in the pacific to get the moonflower plant,but ended founding the tribe of the Aimumu who protect the flower from outsiders,so with the purpose of get the flower and cure the virus the scientist must will earn tribe's trust.
Said that i want to comment about my thoughts and theories,this game will have a new mechanic of top down look that will allow us to explore and interact with the scenario,aside from the usual visual novel style,it seems that there will not be a female POV because i think the point of giving us the chance of explore the village is to spy and get voyeur scenes,now comparing the two stories,arrival is a spiritual succesor but not direct adaptation,so the characters and events will not be the same, i doubt about the possesion scenario,to possibilty of happen it can be but i think the corruption of Claire will happen only by lust and pleasure like in other NTRMAN games,maybe trying gain trust of the tribals,also the guys who will have fun with Claire could be young boys,elders and the chief,about the tribal woman i doubt is Claire,i dont know if she gonna be a prince or a mother but i think it will intercourse with the husband,maybe simply like that or to seduce him and let other tribals take Claire like in the comic from DerangedAristocrat "Anthropoligist Dedication",if you want Claire corrupted i think it will be taken by the village and getting her pregnant,anyway that could be only a final because like its usual NTRMAN have multiple finals,i think in some scenario the two get the flower and escape or in another the tribals hunt the husband