So unless my weeb is rusty OP means Peuwuple that don't make their shoujinkou icha icha hayai should meet kowai desu (in katakana), right?
Gotta love how the Jappy Nippos have 3 different sets of letters, at least 4 different forms of speaking, a few hundred honorifics and more than a few dialects nobody but a few locals even understand...
While I agree that padding obvious pairings with needles arcs of will-they-wont-they can be annoying, there's a certain tendency for authors to want a happily everafter for their main characters at the end of their story, not at the beginning. Resolving the relationship troubles too early without introducing new ones leads to what I would call Dating Sim Syndrome, a long sequence of fluff (and smut) that's only there because it could be forced down the throat. Unless you're writing pure fluff (and even then) there needs to be some sort of conflict be it internal or external to keep the reader (and author) invested.