Often in Tokyo, Japan, you are a 17 year old teenager who likes playing games at home and rarely goes to school and currently you are in your apartment room alone and you are watching your favorite TV show but suddenly the power goes out you've been waiting for 3 hours but it doesn't come back on and finally you look out the window and there's a lot of smoke in the streets, buildings and other things lots of soldiers outside and noise everywhere and yeah you also see a bunch of zombies who are attacking the residents and soldiers who are there

The world is really chaotic and the zombie apocalypse has just started, everyone is panicking, including you, but luckily you are in a 5th floor apartment which is quite high and you can be quite calm but it won't be long, your supplies might only be enough for 1 week. and you have to think about how to get food from outside, seek help from people in the next room, explore this apocalypse world, and meet lots of people and look for partners or anything that can save your life