All at once

It has been three months since the virus has turned over millions of thousands of men, women and children into mindless, flesh eating, killing machine's. Leaving now only few survivors. Sayori, a once depressed high school student and Monika, an anxiety ridden teenage with a tendency to please others have joined together to survive this cruel world and eventually find a cure for this disease. Will they make it? Who will they find along the way?