Labeled as a delinquent and bad influence, high school student Kyosei Ichinose choose to stay out of the people around him, indulge himself to his headphones, pick fights against other people and stay alone.
He knows that people around him all see him as a trash and sometimes feared. His high school days are filled with countless of experiences that makes him resilient to anything.
Everything is normal until the world is now in turmoil after the appearance of a mysterious disease that turns humans into mindless cannibals, infecting humans all around the country in an alarming state.
Kyosei is fine with killing and fighting as he was forged by being a delinquent, however, he was bonded together with his former friends and are all trying to survive. Will he choose to be a lone wolf or choose to revert back to his past self and strive hard to survive in this new age?