Undertale: an corrupted universe

1.The story

One Day, there was two types in the surface: humans and monsters.

There was a war about they but the humans win.

So, the humans sealed the monsters with a barrier in an Mountain.

That barrier make everyone enter...but no one exit...in the mountain...

The monsters promise...that will 𝗸𝗶𝗹𝗹 every human that fall

And they did

Some years later they already have six human souls. . .

Only one more, and they can take revenge on the human type.

And then they waited and waited...but no human falled...

Or...at least they was thinking so...