Some of them are on mangago such as,
http://www.mangago.me/read-manga/a_man_like_you/
http://www.mangago.me/read-manga/blood_bank/
http://www.mangago.me/read-manga/lover_boy_lezhin/
http://www.mangago.me/read-manga/geu_kkeute_issneun_geos/
http://www.mangago.me/read-manga/killing_stalking/
http://www.mangago.me/read-manga/heaven_hell_roman_company/
http://www.mangago.me/read-manga/the_baker_on_the_first_floor/
And some were originally from Japanese.
http://www.mangago.me/read-manga/itoshi_no_mitsuyoku_circus/
http://www.mangago.me/read-manga/yondaime_ooyamato_tatsuyuki/
http://www.mangago.me/read-manga/minori_no_te/
We already got quite many in English
http://www.mangago.me/home/mangalist/130611/
http://www.mangago.me/home/mangalist/73910/
Oh Sorry I juust notice I posted wrong link then. Thai one
http://www.mangago.me/home/mangalist/106534/
I just search for yaoi webtoon in the web and find a lot of great korean bl webtoon in here http://www.lezhin.com/ko/top100
there a chance that they translated to english? ???plz someone say yes.. I wish I can read Korean…