Many friendships begin only after one or both parties hate each other for a period of time. If said friendship progresses into romance, it often leads to Belligerent Sexual Tension
Compare to Fire-Forged Friends
- In the Sonic the Hedgehog video games, Knuckles starts out as a Hero Antagonist, but later becomes a friendly rival to Sonic and works with him and Tails on numerous occasions.
- One episode of Rugrats describes how the main characters started out hating each other, thanks to rumors spread by Angelica.