Personally, I think the eldest prince is under someone's mental control. He seemed really shocked that he got along with his sister at one point, which shows either his memories are distorted or he's currently fighting for control of his mind to remember the truth. But that's just my opinion.
Here's another (kinda) frustrating gay fellas
http://www.mangago.zone/read-manga/fight_on_yeo_manager/
This is hilarious. Thanks for the link
Np, glad u enjoyed it xD I wish they continue it tho
second yaoi guy I hated after that empty duchess couple. too much gay n they become stupid