I Have Fallen For A Soldier (Eren x Mikasa)

Mikasas job is simple kill the target and get away with it until one day she gets transferred and manages to fall in love with a boy by the name of Eren Jaeger and become friends with a boy named Armin Alert only to later figure out that they were kidnapped by a terrorist group called 'Titans' Allies slowly arrive to aid Mikasa in her mission of saving Eren and Armin but will the mission be a success or will it crumble into failure?
[This is a long fanfic that isn't going to end until god knows when so if you want a long fanfic to read then give this one a shot ]