maybe tale of the yellow dragon??
Maybe Aoao waiting to be eaten?? http://www.mangago.me/read-manga/aoao_waiting_to_be_eaten_caught/
http://www.mangago.me/read-manga/koisuru_ryuu_no_shima/ I believe it's this
The first story should be what you're looking for.
Yess, its this. Thank you so much!!
You're welcome!
I'm looking for a yaoi manga about a man searching for his (fated) lover, based on some scale on its body, from his previous life when he was a dragon, it's a one shot story or something. I've been looking for it since last year..
(Reposting this again cuz the person answered me didn't replied anymore)