This is the longest black and white manwha I’ve ever read can’t believe it

This is definitely a manga rather than manhwa (￣∇￣")
But yeah, this is definitely longer than others.

I don’t know how to differentiate between manhwa and manga hehe

Manga is Japanese while Manhwa is Korean. You may noticed it by the characters names and the author as well. Not all but most of the time manga tends to have black and white art while manhwa has color (not all but most).
(๑•ㅂ•)و✧

Okay thanks