Hi, that's me again with one more weird request! ^^

I'd like to find some manga in which romance has a power struggle at the core of it.

The future lovers should be at odds--rivals or even enemies--and they should enjoy it. You know that shounen trope 'I love fighting you! It's so exciting"--only it should continue into an actual romantic development.

PS I'm sorry for almost making a double post, but the yaoi subforum is its own universe)