To clarify, yes, the Duke does know that the world is full of 'shape-shifting' people who are called Demons and looked down upon by the 'normal' people of his Empire.

Don't worry dear, you're life will be f**ked eventually ;)

In a world with healing potions, who needs to care about liver damage eh?

Poor ML. His wife is too focused on getting a niece over a daughter...

I really want to draw this meeting between them. I love this version of the ML, he's so cute <3

Yes, blame Author Yi for the cliche tropes...

Sweetie, you gave him permission...