A story that changes with your saju

I Became King, and My Queen Proposed an Alliance on Our Wedding Night
On our wedding night, my hand was on the door when the Queen held out a cold cup behind me. "If you take this cup, from tomorrow I'm yours." The royal seal is still in the hands of the King's grandmother, the Grand Queen Dowager.
Who's in this world
You'll run into these people in your story.

Shim Yuan
The Queen · Chosen by the Grand Queen Dowager
On the wedding night, she held out a cold cup with both hands

Grand Queen Dowager Kim
Eldest of the royal family
Still holds the key to the royal seal box

Chief State Councillor Kim
The Grand Queen Dowager's brother
'Your Majesty is still at the age for learning.'

Consort Yun
Royal concubine · At your side since you were Crown Prince
News of a pregnancy came from quarters you haven't visited in a year