Responses
I think he just pretended not to know her. A few chapters before he said sth along the lines of having distanced himself to protect her
Since the beginning he knew it was her. He could tell but remained silent because this time he wants to protect her.
When the Duke and her meet the first time he didn't remember her at all and here he seems to remember his past life ??? It is a kind of joke author? Or I missed something? （/TДT)/