Then
Spoiler!
Richard's cheeks blushed as he turned his head slightly embarrassed. Actually he doesn't hate his father defending him. Duke Collin said, "Parents who recklessly unsheathe their swords in front of their children... As expected, Duke Etham doesn't seem prepared to be a father." So Erno rebukes him by saying, "Wouldn't a father do anything to protect his children?" And they started bickering and Duke Collin said, "Then is that why you entered someone else's house and stole the adoption papers? Even threatening His Majesty?"😭
Eirin is like Dad, did you even steal the adoption papers? When she looked at him in astonishment, her Dad frowned as if it were unfair for accusing him. So he replies, "Steal. Do you have any idea who stole them? I wonder if it would be better to blame myself for not handling it properly and losing them." And she realised that what Duke Collin was saying was true. When her Dad lies or when he's in a bad mood, his expression becomes brighter. So Duke Collin said, "I should have prevented you from adopting the girl no matter what." Her Dad laughed, "Do you really mean that?"
Her father says I was talking to this assassin who tried to murder my daughter and not you so Duke Collin is like my son will never do that and what did he do exactly so Erno Etham says he made my daughter cry. Duke Collin was speechless for a moment, as if he had been choked. Her father gives his reason that, "my daughter is small, fragile, and cute, and if even a drop of tear disappears from her body, her life is in danger." So the Duke rebukes him by saying, "My son is cuter, more adorable, and fragile." In response to Duke Collin's words Erno who was slightly lowering his sword, pushed her aside with a smile. At the same time, his power burst out.
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 