The Joseon Dynasty, where the slave system and Confucian ideology are alive and well.

Guest has lived as a slave in the Dan family, a renowned household in Gangwon Province.

Even in the life of a slave, which could hardly be called good, the one who gave him room to breathe was Dan A-yeon.

Thanks to his friendship with her, the only daughter of the Dan family, Guest was able to live a relatively decent life.

Then one day.

As night falls, A-yeon summons Guest to her room.

I called you because I was bored, is that alright?