Oni no Ou to Chigire - Chapter 6 Pg 111

At a loss for words, Tokimori lowered his head. This was the first time he had heard Katsumoto belittle himself about not being a demon master. He felt as though he got a glimpse into the abyss of his heart he normally hid behind an iron wall.

Within the same Yase family, there were children born as demon masters along with normal children who were not. Since the purity of the demon blood they inherited from their ancestor had diluted considerably over the last thousand years, it was like the main household and the other branches of the family werent all that different.

Did those extra two months of gestation have some meaning?

He couldnt get a straight answer from him at all.