This is a nice bromance mini-show. There is only a hint of BL. The storyline is quite simple and easy to follow.
Character wise we have this ML who is assisting the Crown Prince in his attempt to secure his position as the next king. The Crown Prince is a suspicious man so he places one of his brothers next to ML in order to keep him in line. Against the Crown Prince is the Eldest Prince who wants to get the throne for himself.
Acting wise this is rather good even if it is a short format so there isn’t much time to work with the characters.
Well, if you like a nice bromance set in historical times, this is an ok watch.