Historical setting uke is possibly a concubine and or a singer. Has a lovely voice
Seme is in love with one and doesn't want him to go through a procedure.
Is part of a volume and has another story of another couple working in same palace.
May have had earlier story that isn't related.
It's a pretty old manga read it maybe over 10+ years ago

who needs drugs when you got yaoi

Found it
https://www.mangaupdates.com/series/nst9r5y/honoo-no-suna
Thought there was another couple but wasn't.

who needs drugs when you got yaoi