https://toonkor.com/ (korean)
if you look under the alternative titles for the manga/hwa/ua your reading, you'll probably see the title of it that uses Japanese/Korean/Chinese characters an example would be https://www.mangago.zone/read-manga/sadistic_beauty_side_story/
the alternative title is: 새디스틱 뷰티:외전. You can copy and paste it to find its raw(just search through the sites). But irk, i dont look for non-translated versions often
https://rawdevart.com/ (japanese)
Where can i get a non-translated manga/ raw