Geu Angnyongeun Mueoseul Wihae Saneunga

Unwanted from birth, illegitimate child Elaine Newt knows better than anyone that life’s not fair—especially when she's chosen as a human sacrifice to appease the wrath of evil dragon Rabeth, who’s sworn vengeance on the empire for sealing him away for 500 years. But to her surprise, Rabeth grants her three wishes for waking him up from his slumber. When Elaine uses her first wish to stop Rabeth from destroying the empire, she finds herself transported back to the past with a chance to live her life all over again… but this time, with a dragon by her side!
(Source: WEBTOON)