Cut to present day. Relations between humans and monsters are shaky. Many monster societies rely on capturing men, but it's getting to the point where some men will flat out seek monsters to be with instead of human women.

You play a guy who loves monsters, in more ways than one. Your dream in life is to write the most detailed book on monster girls ever written. You also want to include the details of sex with monster girls, because very few books actually delve into the subject. Alas, you are a bitchboy betamale too nervous to interact with the few cute monster girls who live in your town.

That is until a DARK WIZARD appears and begins AWAKENING THE ANCIENT EVILS of the old gods, who are kinda pissed at what their lovely world of destruction and carnage has become, so they create a whole new batch of their oldschool monsters and loose them upon the world to wipe the slate clean.

You are not having any of this shit, and so you get caught up with the monster girls in your town and set out on adventure. Your goals are clear: Save the world and fuck bitches. Not necessarily in that order.