Kimi to Boku no Saigo no Senjou, Aruiwa Sekai ga Hajimaru Seisen
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)
Episode 1 - Encounter: The Two Nations' Ultimate Weapons
Episode 2 - Encounter: The Enemy You and I Met Was...
Episode 3 - Encounter: Successor of the Black Steel and the Ice Calamity Witch
Episode 4 - Intersection: Battle for the Vortex
Episode 5 - Intersection: Awakening of the Vortex
Episode 6 - Paradise: Rin's Big Miscalculation
Episode 7 - Paradise: Alice's Longest Night
Episode 8 - Paradise: The Transcendent Demon
Episode 9 - Paradise: Iska
Episode 10 - Beginning: The Girl Wishes Upon a Star
Episode 11 - Beginning: The Witch Hunt
Episode 12 - Beginning: The Two of Them Trigger the Rise of a New World