I hear Good Omens has something like enemies to lovers? in season 2.
Personally though, shounen manga.
Some creators get so focused on the relationship between a main character and his rival that the hetero romance gets put on the back burner ("He's a guy and she's a girl so you know.. they're in love or whatever.").
Instead, the MC and his rival get the tropes often found in romance -- opposites of the same coin, inverse color schemes, the moon and the sun, the golden retriever and the black cat, etc.
They fight together, they grow together. They complement each other's strengths and weaknesses. They're always on each other's minds.
Famously: Naruto and Sasuke.



