If I can capture the head of the old demon king, everything should be over...
Before you know it, all the heroes are caught in the inner walls of the tentacles
A brave man is captured by the Demon King's army, remodeled so that he can become pregnant, and trained with tentacles.
A hero who has a large amount of semen vaginal cum shot becomes pregnant with the demon king.

The demon king's new body, no way, the hero will give birth,
With his rejuvenated body, he rapes another hero and impregnates the demon king's child.
It is a story about a hero becoming the mother and wife of a demon king.