Humanity wakes up to find that they've all shrunk. Can they survive amidst the hazards that Nature entails?
This is the story of young Alice and her protective dog Poco in this new world.
The lead character, Mao Ran, a person of Chinese origin born and raised in Japan, has been trained in the secret martial art of her family by her drunken lecherous grandfather. Her grandfather has promised her that he'll tell her what happened to her parents to encourage her to train and fight. Without her knowledge, her grandfather signs her up to participate in a televised martial arts competition between female martial artists known as "Prime Mat".
Yoshiko, a hardworking high-school student, is always taking care of others. Despite studying hard for herself, she still finds the time every day to copy her class notes and deliver them to her home bound, video game playing, childhood best friend who has not been to school for quite a while. One day on her way back from delivering the notes to her friend, she notices "black snow" falling from the sky. Confused, she asks her friends Miki and Kiriko if they had seen the snow, too. Having not seen anything, her friends assume she has been overworking herself.
Yoshiko, who also regularly helps out a reclusive uncle, one day brings her friends along to help, planning on doing some karaoke afterward. Due to the appearance of the black snow, an ominous event happens and things keep getting stranger and stranger…
Puuka is an unpopular bikini model. On the way to a spot for a photo-shoot, she and her manager hit a zombie with the car. When Puuka tries to escape she gets bitten and turns into a zombie herself. How will she continue her career as a zombie?