Kimi to Boku no Saigo no Senjou, Aruiha Sekai ga Hajimaru Seisen 1x3

Iska is given a new mission to apprehend the Ice Calamity Witch. By accomplishing the mission, Iska will be a step closer to realizing his dream for a peace treaty. When Iska and Alice meet again, they weren't prepared for what was coming for them.