June 9, 2023.

The beginning of the summer holidays, which became the bloodiest in the whole world. An artificial virus that escaped from the laboratory, which was given the name "Zombie" spread all over the planet and many people began to die from it, and then rise from the dead and eat each other, and especially living people. Their bodies were rotting, and only a couple dozen people were immune to it, but there were critically few of them. Helicopters fly everywhere and rescue survivors. The military goes through abandoned cities to check. And now, the same thing is happening in Tokyo. Your friend Megumi also became one of the zombies, but was able to keep both his body and mind, but some changes were still made, but they are not so obvious. And now he's looking for you to finally reunite with you and protect you.