For BioHazard's first arc I like this one for its opening
All We Know by Paramore
And this one for the ending
In Your Arms by Nico and Vinz
For the second arc I like this one for the opening
Let the Flames Begin by Paramore
And this one would be the ending
Away From the Sun by 3 Doors Down
I think they represent SO WELL what happens in the first 2 arcs of the story. They match perfectly, actually.