It has a Sad ending for me
Firstly,yes it was good that modern person returned to his own world but he lost everyone he loved in a minute,that was too cruel,some might say he loved the king platonically,it doesn't matter,he loved him in his own ways and he lost him,he loved the kid and couldn't even meet that kid,this one particular thing broke my heart and he also lost some wonderful friends,it looks like he lived a very empty life in the modern world,I feel pity for him and I hope he can move on leaving all this as a good memory which I doubt,SO ON HIS PART HE HAD A BITTERSWEET ENDING.
now for the queen part,she definitely had a happy ending but it's just a temporary one,the king will soon not be like the way she wants,if she can achieve the King's love than that's good,(wouldn't work with me,as I don't like my leads moving on that easily)but I don't think that will be possible,THE KING NEVER LOVED THE QUEEN.
Now the king,this poor guy,damn I cried my hearts out when he said he missed something and was so happy when he saw the queen,oh you poor guy,the creators did him dirty,just imagine you think finally you can live happily with your loved one but it's not the same person,he fall in love with the modern person's tactics, behaviour, personality.And if they meet as man,I think this wouldn't be possible as both won't accept it and both being straight doesn't help,but it doesn't change the fact that the king loves that guy,and now if he meets him as a man I think he will be in a lot of mental trouble but he will still at the end love the guy.Now if he can move on from him than that will be great but that is unlikely and I don't think he will come to love the queen as both are completely different from each other,so now forever he will live in confusion and heartbroken.Poor guy,
I cried my eyes out at the That's why it's a sad ending for me.