I like manga where the Romantic Subplot is already taken care of. Think Shaman King. Anna and Yoh are already in an arranged marriage, but they don't spend the whole manga falling in love. Otoyomegatari is another one.

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Kumagawa: Ahem, Good morning to all the minor characters.

I'd love to read something like that as well. It's a rare thing, though, and the only title that comes to mind is Discommunication: Seireihen.