Best (at being the worst) Shonen/Seinen Series Romance?

What's the best (worst) Shonen/Seinen series couple you've ever seen?

We all know that 90% of the time romance in a shonen/seinen series is just an after thought and therefore replies on the "he was a boy and she was a girl, can I make it anymore obvious" logic but what is the romance that was the best at being the worst?

I'm just curious lol

Unrelated to my own topic but I liked the main couple in Gantz and Hi Score Girl. Feel free to add one you think is good afterwards.