Hwangtaeja Yakonnyeoro Saranamgi

On her way back home late one night, office worker Sophie stumbles into another world where she's a princess?! Well that's what Alan, prince of the Lapis Kingdom, says. To return to her world she must fulfill the prophecy and help Alan become king. Sophie agrees but...amidst a war for the crown, can she survive?
(Source: Tapas)