Camping here for recs~ I am fine with novels too!
Hii! I cant remember any bls rn which satisfy all the constraints but here are some fantasy bl with the royalty premise that I can remember, tbh they are all pretty famous too so you might have read them before :
https://www.mangago.zone/read-manga/should_i_write_you_a_love_letter_instead/
https://www.mangago.zone/read-manga/the_moon_painting_alchemist/
https://www.mangago.zone/read-manga/eternal_covenant/
https://www.mangago.zone/read-manga/turning/
https://www.mangago.zone/read-manga/two_empires_the_slave_of_the_empire/
https://www.mangago.zone/read-manga/the_fallen_duke_the_knight_who_hated_him/
https://www.mangago.zone/read-manga/i_was_reborn_as_his_highness_the_prince_s_little_evil_dragon_shonen_ai/
https://www.mangago.zone/read-manga/moonlight_kie/
https://www.mangago.zone/read-manga/drick_s_heat_drac/
https://www.mangago.zone/read-manga/sweetie_sweetie_sweetie/
https://www.mangago.zone/read-manga/don_t_press_the_button/
https://www.mangago.zone/read-manga/duke_s_private_tutor/
https://www.mangago.zone/read-manga/who_s_your_daddy/
https://www.mangago.zone/read-manga/smyrna_capri/
https://www.mangago.zone/read-manga/regas/
https://www.mangago.zone/read-manga/one_day_i_was_proposed_to_by_my_enemy/
https://www.mangago.zone/read-manga/the_nameless_flower/
https://www.mangago.zone/read-manga/how_to_be_the_chosen_one/
Omg thankyou so muchhh
Currently in the mood for fantasy-royalty BLs (bonus if its like those isekai romance ones but yeah make it BL lol), another bonus if its completed and actually has really good plot? Otherwise anything with the premise of royalty BLs are fine (prince/king-prince/king or prince/knight is good, although i wont mind if yall got any prince/commoner ones too) as long as its yaoi not shounen ai lol