Responses
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I don’t have any royal themes sorry, but here (=・ω・=)
https://www.mangago.zone/read-manga/kekkon_shite_kudasai/
https://www.mangago.zone/read-manga/it_s_my_baby/
https://www.mangago.zone/read-manga/hyacinth/
https://www.mangago.zone/read-manga/arima_wants_to_be_an_omega/
Adding this link too, it’s a list of bl with children for you to browse:
https://www.mangago.zone/home/mangalist/1081363/
any bl reco with separated couple + seme dont know they got children (fantasy/royal theme is a plus, i want to see a bl ver from reading too much straight manhwas lately but modern themes r also ok)