Merciless World {Levi X reader}

I wasn't abandoned, I ran away. Or at least that's what I like to tell myself.

I was normal. Normal family, normal friends, normal life. But everything changed that one painful night when I felt a sharp pain in my chest, and the heart disease surfaced. My family tried to support me, but eventually it was too much for them, and they moved, abandoning me, a 10 year old child to rot in the gutters of Wall Rose.
By cruel turn of events, I found myself in the Underground, trying to escape enslavement.

I am 14. I try hard to support myself, but I'm not made for this environment. What happens when I can't get the medicine, when my heart's going to give out? Will I find a way to survive?

Will I ever see the stars again, or more importantly, my family?

[told from first person, x reader!]