Akujo desu ga, Umareta Tsuide ni Koutei ni Narou to Omoimasu

Joo-Hyun Mo, CEO, has a big day ahead, and is awaiting her big break, when she gets into a car accident. She wakes up, but is reborn as the third daughter of the evil emperor, Mezan Nox. Without a clue as to why this has happened, Mo lives as Gloria for seven years before she finally gains a clue into a magic portal that could help her go back to her world. She is determined to play the part of docile sister to evil father and mini-me daughter, Isabelle, while also looking up to her oldest half-sister, Dorothy. With the help of a prince from another country Rubilion's Autus, she finally passes through the portal, only to be met by an even more impossible deal: she must sell her soul and succeed in seeing her father fall to his miserable death, just as the real Gloria wished before she died. She has one shot to succeed, and to go back to her own world. (Source: POCKETCOMICS)