Shun Ishiwaka

After a global financial crisis, the world is engulfed in an AI-driven "sustainable war." It's up to Section 9 to counter new forms of cyber threats.

Two different students - a successful but aloof academic and a rebellious but kindhearted delinquent - form a friendship through their love for music.

For a chance at a pardon, a ninja assassin joins other condemned criminals on a journey to a mysterious island to retrieve an elixir of immortality.