AISHUU
KOISURU BOUKUN
NEON SIGN AMBER
Hate Mate
Of all the mangas I've read I only include hre the unrequited love stories I like. You can check my individual feedback. Look at the back pages too there are jewels there http://www.mangago.me/home/mangalist/43233/
As for the slow burn you are talking about, that is the main ingredient of my list. I prefer suffering and painful one-sided love
Can y'all recommend any yaoi with unrequited love? Not like for one chapter and then the other character falls in love. Maybe something like a slow burn?