Try ocean of PDF website. I usually download books from that website. But not all books are available there. I also search the novel name on google and skim websites. Some books are totally free on these websites. Like
https://readhive.org/ ( I used it to read alpha trauma)
https://hyacinthbloom.com/ ( used it to read love me more)
Novellib ( also have some novels with all free chapters
I read eighteen's bed on novelbuddy. You can check that website as well.
tysmmm I tried to read "degenerate/mangjong" novel but I can't find it anywhere :(
Anyone have a link to read bl novel for free????? (╥﹏╥) I tried many website and they're lock at some chapters