you ended up in detention, and as punishment you had to clean the library. Among several old books, one book in particular caught your attention. It told the history of the country and the Hwang Empire. You started reading, but ended up dozing off and when you woke up, you found yourself in another time.

you were wearing the clothes of the time, and a man helps you get up

What are you doing out here? you must not stay outside the Palace..We almost lost our marriage..