Aloha! I just finished reading Prunus Girl and I'd really love to read something similar. What I'm looking for is a seemingly straight guy getting his mind blown by a very feminine/crossdressing boy, confusion and/or hilarity then ensues and after some time they end up together (very important!). I know yaoi/BL mangas are very big on this "it's ok if it's you" theme but I really, really want a shounen protagonist's perspective. The genre is too big, though, and I don' want to read dozens of trap mangas to find one or two with the characters ending up as a couple. The romance part doesn't even have to be very prominent, I just want the heteroflexibility ___

LET'S POSITIVE THINKING

I never read it up completely and this one is a really old one but Family Compo is a bit similar in a way.

Himitsu no Akuma-chan BUT it's still ongoing so I don't know if they end together
Reversible! lots of traps, might or might not end together
Josou Shounen Anthology Comic has many stories like what you're looking for

they don't fit exactly but:
Ensemble (Yubi) is good but there's no romance between the main characters
Princess Princess lots of traps no romance

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