After being reborn,both sisters refused to marry

"In her past life, she and her sister were daughters of the Supreme God, but they were betrayed by the men they loved and sent to the underworld to suffer. One lost her Eternal Divine Core, while the other was destroyed by the Demon Lord. Reborn on the day their marriages were announced, the sisters refuse to repeat their fate. They abandon the gods who betrayed them and choose the Frost King and the Lord of Humanity instead. When the truth behind Seraphina’s 300-year disguise as a demon is revealed, Mars and Janus finally regret everything. But this time, the sisters will never look back. They will reclaim their power, their honor, and the love they truly deserve."