
thats such a roundabout way of saying your bloodline is prone to produce psychopathic offsprings

Spoiler...
The son is like small Cecil. The feelings of Cecil becomes a chromosome and is the natural attitude of the son(he basically wants to marry Bertia like any other kid but mix it with possessive attitude). Came the little sister that looks like Bertia but with heterochromic eyes, he becomes a siscon, but the sis ain't having it and wants to marry someone else.
tsuda's voice really be hitting different, i just hoped that some effort couldve been put into the animation :")
Sameee but I heard the mangaka wanted it that way