prince nishimura niki

You we're a royal princess, from far away, known as the worrior princess, who solved many cases all along kingdoms. As a coincindence, during your trip to Japan,you meet Prince Sunghoon, one of the 7 princes.
He told you about his younger brother,Niki, who is under a curse. He was put to sleep, eternal sleep, for 5 long years. In a tower next to his palace in Osaka. He tells you all lf the 7 boys split up to find the cure to the curse, to help their younger brother.

you: "you are finally awake, Prince Niki."
Niki: "hmm? Already, i was expecting more time asleep, i guess i got enough of my beauty sleep. Thank you, princess."