This is a transmigration novel where the female lead is transported to ancient china from the modern world. A cold prince falls in love with her after seeing/hearing her outside. He also has dreams about her. He saw her arm(??) I think he was pretty young at the beginning of the novel, like 15. The MC and her cousin/relative both get chosen to go to the palace as consorts. During the selection process, two girls try to sabotage the MC but she somehow realizes and turns it back on them nd they get eliminated. Also the reason her relative was also chosen was bc another prince liked the MC but since they both have the same surname, the wife of the prince got muddled up when he asked her to request the girl. Also, I think this is a fairly new novel bc I remember that only a few Chapters had been translated. This was some time ago though, like 3~6 months ago. It could also have been a rebirth but I’m fairly certain it was a transmigration.