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x754 Yes, you're right in that it would negate that particular objective of the story. And that's how competent writing with character progression works. The characters continually clear various objectives. It would indeed no longer be about Daisuke trying to deal with Chiriko at arm's length, or Chiriko exposing herself just to tease him, and they would not simply be awkward housemates. Instead, we'd have new opportunities: Chiriko could start cleaning, too, and it could become a collaborative effort. They could start working together in a part-time cleaning business, starting with perhaps some of their friends' homes. Daisuke could go from loser nobody to having a circle of friends and acquaintances who see him as worthy of respect. They could explore the family relationships more. If Chiriko and Daisuke started relying on each other in a solid relationship, the story could then start dealing with her obviously dysfunctional family - and she'd have that strong pillar of support there beside her. Dating could introduce more characters, the school setting, etc. Although personally no matter what happens, I think Chiriko could keep exposing herself to tease him - relationship progress would mean that he could actually respond positively to that instead of getting all cherryboy embarrassed about it.
If there's no romance progression in a romantic comedy there's literally no point in reading it, imo, and delaying that progression too long is one of the reasons why people get such a hatred hardon against these MCs whose writers won't let them break out of their virgin betaboy literary prisons.
Like oh, pretty girl wears revealing outfit, MC has quite the reaction - this is fine the first, second time. After all, this is a NEW THING! But the third time it happens, I've started to lose respect for the MC and respect for the author, because the work starts to lose authenticity. The guy is behaving in a way that has no correlation to real life - he's no longer a realistic character, but just a trope, static comic character like Beetle Bailey or Dennis the Menace.