Long ago, two races ruled earth; HUMAN MEN and MONSTER GIRLS . . . (also human women.)

One day, war broke out between the two females races over the men.

When the human women won, they sealed the monster girls underground with a magic barrier.

Many years later, it became a mountain called Mt. Eboob.

One day, you were just playing with your friends, they decided to go near the mountain as you were dared to go in the secret passage of the mountain, you went in the small passage and tripped.