Responses
spoiler alert:
it seems rushed, and it is because they get married impossibly quick not to mention the baby on the way, but youll see (in several chapters from now, its far down the line) in flashbacks that they were hanging out a lot beforehand and actually had time to develop true feelings for each other. sungyeon did fall in love fast though
Pretty weird plot, and the relationship seems kinda rushed, but I think it's cute.