Some of them are not even gay but good bromance hope you like it tho(￣∇￣")
https://www.mangago.me/read-manga/a_mild_noble_s_vacation_suggestion/
Not really royalty but still a noble
https://www.mangago.me/read-manga/the_duke_s_redemption/
A duke x his assistant!
https://www.mangago.me/read-manga/eyes_clouded_by_the_tiger/
Kinda if you think about it lol
https://www.mangago.me/read-manga/the_moon_painting_alchemist/
An alchemist x a king
https://www.mangago.me/read-manga/my_master/
Butler x royalty
https://www.mangago.me/read-manga/kashikomarimashita_destiny/
Same thing
https://www.mangago.me/read-manga/shinai_naru_omega_e/
Omega verse manga you might not like it
https://www.mangago.me/read-manga/meiji_juuzoku_tungsten/
https://www.mangago.me/read-manga/king_s_maker/
I think https://www.mangago.me/read-manga/blood_bank/ but I haven't read it in years so idk
Im obssessed with these two and i need more gay. Anyways basically servant x royalty. I prefer webtoons but i will take manga. Please and thank