Uta being in forced marriage might be why she hated his guts, but the current Urta feelings matter more, although if Ryuu reveal their past might be complicated.
Ugh, stories of being reincarnated/regressing/timelooping always get me in the feels. They have to face their regrets, mistakes, loved ones, etc, and it's so bittersweet, that they get the chance to make things right this time around 🥺