it's a webtoon where the mc reads a manga, he was the only one reading 1000+ eps,, and when he reaches the last chapter(he was reading from a train?), the exact things from manga starts to happen, weird things start to pop up out of nowhere -lmao that's the only thing i remember, i was only 2 chapters into it
manga/manhwa that made into anime, preferably bl/yaoi but others is also okie
https://www.mangaupdates.com/series.html?category=Adapted+to+Anime&orderby=year
Sorted by year. Not sure what a manhwa adaptation is called, I only saw donghua tag:
https://www.mangaupdates.com/series.html?category=Adapted+to+Donghua&orderby=year
my babies (▰˘◡˘▰)