
Well it does seem odd and weird him proposing but one thing that was brought in the novel 9that they skipped is that the scene where they are on the roof,0 in the novel he tells her he will propose again but will wait till she is 16, so maybe not ENTIRELY what some people will like but he does wait before proposing AGAIN.
At least I assume so as I am still in the early chapters of the novel so I can't make an guarantees ...... as of yet that is!(๑•ㅂ•)و✧

(BIG sigh) I know but because I LOVEヾ(☆▽☆) the novel and the mc and Ryoul ( I hope I spelled the tiger's name right) that is the ONLY reason I am reading it, there is nothing wrong with that guy being older but could they at least kept at a 2-3 year difference at most!? ┑( ̄Д  ̄)┍
I guess it is just another one of those WEIRD things that you have to accept that happened in the ancient days regardless if you agree with it or not. ( ̄へ ̄)I think I will go read the novel and when I am done I can tell you who the mc ends up with if you are fine with spoilers that is!(๑•ㅂ•)و✧

something to do with health, the younger they are the more healthier they are, back then it was just important, giving birth to heirs and all stuff, like there is this African culture that marries off their young females to produce more children, the more children you had the higher up your rank would be. There is more to it but it's 6am rn so... ╮( ̄▽ ̄)╭
Proposing the engagement I can understand. Nobles used to get engaged almost as soon as they were born, since the goal is political. And Sera has Roux, which makes her very desirable as a marriage candidate. But WTF is he thinking TRYING TO ROMANCE A SIX YEAR OLD?!
Ok, our MC is mentally much older, but when he started throwing lines like "You are not a child to me" and "You are the only one I acknowledge as my equal" all I could see were red flags. Those are the kind of bullshit that older guys say to young teenager girls to get them to bed. "Oh, you are so mature for your age" or "You are the only one for me" or even "You are not like other girls" (╬ ̄皿 ̄)凸 GET LOST!