Responses
Sounds like this but the ML isnt an emperor http://www.mangago.me/read-manga/i_became_the_hero_s_mom/
im sorry i dont know the manga, but leaving my comment cause im interestedヾ(☆▽☆)
THANK YOU IT WAS THIS ONE.
I think this girl got sticker into her favorite novel and became this girl in the story and she gets to meet the emperor and his son. She has a crush on the son and gifted him a lot of stuff and the emperor thought the gifts were for him so they were gonna get married or something