Spread Your Wings (A Ereri Fanfiction)

"And just like that, he was gone."
With a new journey to venture outside of the walls, Eren Jaeger along with his few friends, meet with many tragic deaths due to the man eating creatures, known as titans. But what will Mikasa, Armin, and Levi do when their brother, friend, and lover spreads his wings and flies back home to be with his mother once again?