Any good long completed MANGAs, either bl or shoujo. I really like Ameiro Paradox (bl) and...

https://www.mangago.me/read-manga/the_red_thread/
https://www.mangago.me/read-manga/kawa_ni_sazanami/

Wait my bad the second isnt complete a-

Kamisama no Uroko
Our Not So Lonely Planet Travel Guide
Smoke Blue no Ame Nochi Hare
Heart no Kakurega
Ugetsudou Antique

I don't remember the plot to ameiro paradox anymore but here are some long mangas that i like :D

I already read the first one, so i will read the 2nd