Located in a secret stronghold on another continent east of the Dark Mist Forest, there are a group of mixed-blood descendants left by humans and monsters in the wars with monsters over the years. Most of them are related to the passionate and lewd succubus. These descendants, whether male or female, have inherited the special abilities of the blood relatives of the monsters, such as magic, magic resistance, sexual ability, and of course, all sexual activities such as mating and reproductive pregnancy far exceed the desire of ordinary people.