A month after Vandalieu had decided to do something about the Ghouls’ declining birth rates, he was using the blue flames of【Demon Light】to deal with the heat of summer. Vandalieu quickly identified the cause of the Ghouls’ low probability of becoming pregnant.

The method he used was to have ten Ghoul men and women「do it*.」Before, after and also during the act, Vandalieu used【Spirit Form Transformation】and【Sense Life】to determine whether their genitalia, sperm, egg cells and organs were working correctly.

TLN*: The verb used here is the most polite way to say “to do”, it’s pretty much never used in regular conversation


The cause that he found as a result was a simple, basic one.

First, the sperm of the Ghoul males only survived inside the females for around half a day. This was a much shorter duration than those of other races.

Next, the egg cells of the females only lasted six hours after ovulation. Again, this was much shorter than for other races. In addition, their menstrual cycles were similar to other races, meaning that ovulation occurred only once a month.

「In most cases, I guess the sperm or egg cell, or both, die before fertilization. That explains why they can’t get pregnant unless they do it every day.」

Ghouls had no way of determining an appropriate timing in the menstrual cycle to try and conceive, so that contributed to the problem as well.

「I see~ That’s how it was. But Vandalieu, why do you keep calling baby-making『doing it?』」

「… I’m still at an age where I’m hesitant to say it so frankly.」

Vandalieu was careful to not look at Bilde, who was lying on the bed made of tree branches woven together after having just finished「doing it.」

『I’m sure that on Earth, it would be the subject who finds this kind of research and treatment more mentally difficult than the researcher.』

For some reason, he was in a strange mood. No, he was happy that his work had produced results and he felt even more motivated. But strangely… He felt slightly downhearted? Like he was suffering? Why did he feel like this?

The reason for it was probably the fact that he was researching ways to treat the infertility of cute girls. He hadn’t interacted with the other sex on Earth or in Origin, but now he was in this situation in Lambda. It was kind of unfair. Yes, yes, it was Rodcorte’s fault, everything was Rodcorte’s fault.

「So don’t you have to just stop those sperm and egg cell things from dying? Can you do it?」

As Vandalieu contemplated the problem with no expression on his face, Bilde made this suggestion. It seemed that she didn’t really understand what sperm and egg cells were, but she was exactly right.

「I can.」

Indeed, lengthening the lifespans of the sperm and eggs was simple. With Vandalieu’s death-attribute magic, he could even prolong the life of a fatally wounded person for days. It wasn’t difficult for him to keep the tiny sperm and egg cells alive.