https://www.mangago.me/read-manga/tadaima_okaeri/uu/bfd7448b4a940cd158f08b65402c8a6a_chapter-1/pg-1/ - but manga and omegaverse
https://www.mangago.me/read-manga/this_ending/- but like stuff happen
This tag may help
https://www.mangago.me/tag/Established%20relationship/
Are you ok with mangas too dear? If so I have a list for it I hope it helps and you enjoy!
https://www.mangago.me/home/mangalist/2547811/

Anyone know a bl manhwa with the main characters being already a couple. Like we start the story with them already being in a relationship.