The story describes the accounts of Tom after his discovery of a drug that emulates the response of the female brain to ovulation and enhances it 1000x.
It makes women horny beyond control, releases eggs, makes them pregnant even if on hormonal birth control, numbs the gag reflex and pain of deflowering, among other things.
Tom discovers slowly how to use this drug to make a living, entertain a growing harem, cuckold, and ultimately spread his genes around the world.
Young man from a well off family becomes a super rich man after his Uncle dies and leaves him a world-wide empire of mining operations. But he finds out that inheriting assets and keeping them may be two different things. As a rich man, he finds a lot of women are very willing to give him their all. He even gets introduced to some BDSM and decadent practices. A complete story, but I may have a couple follow-ons in mind.
All residents of the remote valley have now become accustomed to the continued isolation. Everyone is doing their best for surviving, education, and prosperity. Young women’s hormones are increasingly influencing their coexistence. The abducted girls strive to satisfy their awakening sexual feelings and needs. Many have decided to live in the valley for as long as possible and to lay the crucial foundation for long-term survival by having children. What about the mystery of the Inca grotto?