Responses

I didn't know they were cousins, but in my country marriage between cousins it is legal, I know some married couples who are actual cousins so it isn't that unsual where I live, around here some people find weird and some not. And aristocracy is well know for consanguineus marriage all over the history , if they were a boy and a girl they could be betrothed since childhood if their family got along.
( reading chapter 28) Oh my goodness, I’m starting shipping yuuri and lucas, childhood friends+ royal frenemies to lovers it’s such a good plot for a historical BL(could also be a red flag BL,though ). Yuuri its just too sweet and Lucas has a soft spot for him, such a cute friendship with a drama of rival families between them.