The author of My Kingdom manhwa is not widely known to me. But you could try searching on popular manga websites or asking in dedicated manga communities for the exact name.
Often, manhwa on the Chinese kingdom showcase rich cultural details, epic battles, and the exploration of different social classes. The storylines might incorporate elements of romance and adventure too.
The best bet could be to search on well-known manga and manhwa aggregator sites. They often have a wide range of options and might have the English version of 'My Kingdom' manhwa. Just make sure to stick to legal sources to support the creators.
Romance yaoi manhwa often features intense emotional connections between male characters. The art style is usually very detailed and expressive, and the storylines focus on love and relationships.
Manhwa romance sex often features intense emotional connections and visually appealing depictions. It may focus on the chemistry and passion between the characters.