When Monsters Rise (Haikyuu Post-Apocalyptic AU)

(completed)

Osamu is sitting at school with his boyfriend and two best friends when he gets a text from his twin brother who just came home from America with his best friend.

Everything is going well until an infection that no one was warned about starts to spread.

Warnings:
-Violence
-Swearing
-Gore
-Angst
-Badass Atsumu

Please note:
-None of the pictures or songs used in this story are mine, all creds to the owners
-I wrote because I'm bored, okay?