There was a room.
This room has only enough space for one person to finally be able to live out their lives.
But there is no one living there now.

Living meat was overflowing out of that place.
Like previously stated, the meat was living.
That living meat had to violate females in order to make children. That was the only thing that could be done.

To animals, preservation of their species is the number one concern.
Therefore if on the verge of death, men's penises would be erect, right?

So, what of the women? What do the women want?

They want their warm, ripe flesh holes to be satisfied and filled with a thick cock...
While they embrace each of their desires and feelings...

[From DLSite English]