Little, Brown Book Group 86 - Eighty-Six, Vol. 11 (light novel)

As Lena and Shin take their first steps on Republic soil after what seemed like a lifetime, they find a country that still hasn't changed—one that cannot change. But their newest operation can’t wait. After surviving battlefield after hellish battlefield, and seeing what they have to return to, Lena and Shin begrudgingly take their first steps into the darkness...But the ghosts of the dead gather to stand in their way, their eyes a cavernous silver.