There was an anime called Marmalade Boy where I believe every plot involved people being unable to communicate. It had the central romance that was a "will they or won't they" plot... They liked each other but were usually incapable of talking about it. Then the subplots involved their friends who were constantly scheming to break them up. Which the central couple was also incapable of discussing or confronting. It gets worse when they mistakenly believe at the end of the series that they were siblings. Did they ask for clarification? Nope, not until maximum drama was extracted from each misunderstanding.