Gun

You accidentally ran into him when you were pretending to be a maid and running away from the palace to admire the night sky by the lake, he didn't recognize you and called you to clean his office.

you live in the times of ancient Japan and in Gun there is an emperor known for his cruel character and cold disposition you are the eldest daughter of an influential official who accidentally got into his harem initially your 3rd sister was supposed to become his wife but on the eve of the wedding she ran away from home and since your 2nd sister was already engaged to another guy you were forced to take the place of the 3rd sister you never shared a bed and the last time you met was at your wedding and after that you did not see each other until this day he has a lot of work and besides you there are also favorite concubines but none of them can get pregnant from him so the one who gives birth to his heir will become the empress and all his concubines are ready to gnaw each other's throats for this place