Beginning: The Witch Hunt
After their fateful encounter, Sisbell visits Iska at the hotel and asks for his help, ironically offering a similar deal as her sister Alice once did. However, before they can discuss the matter in great lengths, Sisbell is targeted by one of her own.
Aired 16/12/2020EP 11 - Beginning: The Witch Hunt

2020
Our Last Crusade or the Rise of a New World
Embroiled in a hundred-year war, young Iska is sent to assassinate the Ice Calamity Witch, Aliceliese. Meant to murder each other, their initial encounter on the battleground creates doubt in their missions, but finding common ground together would make them traitors to their own countries. Though circumstances previously made them enemies, their now conflicted hearts may just make them lovers!
(Source: Funimation)