Royal / Medieval Recommendations

Hi guys! I'm looking for some Royal / Medieval BLs but I'm searching for a specific trope, idk what the trope is called so I'll just describe what I'd like!

Basically, One is royalty and the other is like an attacker on the royal family or just castle whatever, and prince gets kidnapped by him.

Possibly green flag (yellow is okay too), NO omegaverse/mpreg. It can be short, can be long too, i don't really care for the length of it. Can have nsfw scenes can be without, I also don't care about that!