I agree with you. ٩(๑❛ᴗ❛๑)۶ It just surprised me...because at the beginning of the series, there were hints between those two. But when I read novel spoilers...people said nothing romantic story for them. And by the end of the webtoon main story... there was no clear indication of any romance for them...so I concluded Felix is someone who wasn't really interested in dating/marriage and was more focused on his work.
Then, suddenly, there were side stories about them..which caught me off guard and made me update my mental image of them a little. (=・ω・=)

This kinda surprises me. I thought that Felix is someone who never dated and I like him for that as it's interesting to see a noble character dedicated himself to work and just enjoying life without conform to romantic expectation of a noble.
I like Lily but...I kinda hope Felix and her did not end up together. I kinda want Lily and Felix to just live happily without having romantic relationship with anyone.
I'm okay with anything though. They both deserved happines.
Also, is this the first time Felix interacted with his dad? Seriously, I thought they don't talk to each other anymore...since during the meeting between nobles (when Claude in coma), the dad don't even greet Felix iirc? (づ ̄ ³ ̄)づ