Please, don't die. At least you

A terrible disease has struck the world. The virus lives in every person, but no one knows when exactly it will awaken. The day before death, the victim feels weak, then an unbearable headache sets in, and then the person dies. Morio and Kiyoshi are childhood friends. They have no idea what's happening at school or why their friends are dying one after another. In this nightmarish world, they have only one thing left to do: stick together.