What r some bls where the couple is already dating in the beginning of the manga?

http://www.mangago.zone/read-manga/rv/
http://www.mangago.zone/read-manga/sweet_hour_1r/
http://www.mangago.zone/read-manga/hige_to_suzu_to_shabondama/
http://www.mangago.zone/read-manga/mr_100_perfect/
http://www.mangago.zone/read-manga/futari_hyakkei_kaze_no_owari_haru_no_hajimari/
http://www.mangago.zone/read-manga/this_ending/

http://www.mangago.zone/read-manga/pochi_to_tama/

This is the list: http://www.mangago.zone/tag/Established relationship/

THIS IS MY ABSOLUTE FAVORITE ESTABLISHED RELATIONSHIP MANGA THAT EXIST:
http://www.mangago.zone/read-manga/nichijou_climax/

http://www.mangago.zone/read-manga/nichijou_climax/
http://www.mangago.zone/read-manga/vanilla_chocolate_cigarette/

http://www.mangago.zone/read-manga/tiger_s_wedding_day/

ESTABLISHED COUPLES⠀⠀⠀⠀ᴺᴱᵂ ˡᶦˢᵗ
http://www.mangago.zone/home/mangalist/820385/

Follow the list to be updated. And if you liked the mangas/manhwas I included, please do recommend. Enjoy~ (人 •ᴗ•)