
SPOILERS
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First of all, there was none of this Jennette-Claud interaction nonsense. From start till end, the only person that Claud held dear to him was Athy. When Athy went missing, he desperately searched for her. When he finally managed to "catch her", Claud really put in effort to try and maintain/re-establish the loving father-daughter relationship with Athy. It was very endearing to see his efforts and the scenes between the two. Also, when Lucas came back, he managed to cure Claud and restore his memories by sticking a branch from the Old Magic Tree into Claud (sounds ridiculous, but it's true). Once Claud regained his memories, he remembered how he tried to kill Athy and he said to her, "You will always be my one and only daughter." Not the exact words, but something along those lines to tell Athy verbally, for the first time, that he sincerely loved her. Athy in the novel remained as someone who "reincarnated into a novel" instead of "reincarnating into the past".
There's a lot of changes to this story in the webtoon and it angers a lot of people because how the novel played out after Claud forgot his memories satisfied all readers and we were happy with the way it developed. In the webtoon, there's all this unnecessary drama.

https://www.novelupdates.com/series/suddenly-became-a-princess-one-day/
????? isn’t this it????
Wait, so I'm reading the comments, and some peeps are saying it's deviating from the novel. But can someone please explain to me how and where the webtoon is going in a different direction???? Spoilers are welcomed!!