Responses
Some of the details hinted me of this one manhwa but idk if it's the accurate bl that you're looking for but here it is ٩(๑❛ᴗ❛๑)۶
https://www.mangago.zone/read-manga/in_the_castle_the_dragon_s_erotic_education/
OMG IT WAS THIS. thank you so much (๑•ㅂ•)و✧
YAAYY,, yw ε=ε=(ノ≧∇≦)ノ ENJOY READING
i cant remember the title but it was about a guy who ended up in a castle. the castle had a butler, and the last dragon was in there and they were waiting for it to hatch.. and there were a bunch of different species who also came to live in the castle and the mc makes friends with them..