Some WEBTOON charas are like that but usually even without a new partner most mcs aren’t foolish enough to “go back” to ppl like that lol (tho makes me wonder while it is cliche to have some rival douchey be the next bf I wonder if like minded cheaters just gravitate to each other lol I think I’ve seen a handful of Korean drama Like stories where they’re “ok” with being the “mistress/other woman”
Tho job aside I can totally imagine ppl moving outta the city after a long term relationship ends just to lower chances of seeing each other again