Switches

A long time ago, this is as close as I got to the sun. They only switch like 2 or 3 times
I think the story was good. Rivals to lovers.
https://www.mangago.zone/read-manga/haru_wo_daite_ita/

There's Playtime with Hakdo, Thirst, and (I'm not sure about this one because I haven't read it yet) Dark Heaven

here's a list i found, i think you can also search for stories with seke tags

https://www.mangago.zone/home/mangalist/292475/

theres a few in manhwa but its def more common in manga so maybe try checking out some more of those. https://www.mangago.zone/read-manga/pygmalion_1/

Switches
https://www.mangago.zone/home/mangalist/2704304/ Hopefully some are new to you