Fucking Zombie AU
Sayaka stubbornly tries to save Kyouske but fails, leading to her getting bitten. Kyoko manages to pull her out and helps her up to join back to the rest. However, Sayaka was beginning to turn. As Sayaka’s life began to ebb away with the virus infecting her body, Kyoko was left with a choice to either end her or to join her.
You can guess which decision she took.
AU by madokas-dokas