I misread the text.
It is a specification of this game that if the queen's strength reaches 0, she will not conceive regardless of the fertilization rate.(I didn't mention that in the HowTo. Sorry.)
As for the reason for the rapid decrease in HP while trying to go outside, I will address the mechanism that seems to force the piston to stop when trying to operate the button on the right side, as it seems to be doing something bad.
We are still investigating the fact that ejaculation was possible even with zero remaining volume.