Again, I dont really see the romance in their relationship. Hiro found her attractive but annoying and her Nobility a complete nonstarter for most of those volumes, somewhat of a friend for less then a volume, and then begrudgingly a fiance at literal gunpoint after "saving her life" with sex. So I don't even see it the end result as anticlimactic, just the inevitable result of her being in Hiro's orbit.
3 things I wish to know
1. Which Chapter of the Web Novel is that?
2. Which Web Novel Chapter is this Manga chapter?
and 3. Where to read? So I have the Latest available WN chapter