In a scorching apocalypse, two sisters are reborn in time. Vivienne once again seizes the Ice Serpent Sebastian, while Charlotte takes in the Fire Dragon Lucian, whom her sister had abused in the previous life. Charlotte knows that the Ice Serpent must drink human blood to survive, while Lucian’s true power lies in absorbing heat. As the heatwave worsens, Sebastian breaks the beast folk’s oath and descends into demonhood, turning Vivienne into a mere blood bag. Charlotte and Lucian fight side by side, using his spatial powers and newly gained ice magic to destroy Sebastian—first as a three-headed serpent, then as an undead dragon. In the end, they build a survivor base, restore hope, and marry according to beast folk tradition.
