Season 1

Season • Oct 4, 2001–Nov 3, 2001

In the future, a meteor brings a deadly virus known as M34 to Earth, turning humans into vicious monsters and wiping out most of the population. Government agencies form to fight the infection, including NOA, which equips its soldiers with nanomachines that let them transform and battle the infected. But as the virus mutates beyond their control, the fate of the world rests on a 16-year-old girl with the power to defeat it.
  1. S1E1 - Encounter

    Encounter

    27 min • Oct 4, 2001 (25 years ago)

    In a world under attack by the rampant M34 virus, the NOA soldiers stand as the best line of defense against the new strains that keep emerging. One soldier, Yuuji, is torn between duty and his place in the world until a chance meeting with a shy girl named Ai, the agency's latest weapon and mankind's newest hope.

  2. S1E2 - Farewell

    Farewell

    28 min • Oct 4, 2001 (25 years ago)

    Yuuji is hospitalised due to injuries from the last battle as the rest of the NOA team heads off into the battle. In the heat of the battle, Ai discovers the horror of the M34 virus as Yuuji confronts her fears and his own insecurities.

  3. S1E3 - Notice

    Notice

    27 min • Nov 3, 2001 (24 years ago)

    The NOA soldiers return to the home base to begin what they think is a break from the action. One by one, they begin to show symptoms of being infected, except for Yuuji. A new strain of the M34 begins to emerge, bringing the NOA soldiers face-to-face with this new unstoppable threat.

  4. S1E4 - Presence

    Presence

    26 min • Nov 3, 2001 (24 years ago)

    As the virus outbreak grows out of control, Yuuji slowly recovers from his injuries from before. In the face of growing danger, Yuuji begins to realise how much Ai means to him. Yuuji races to the aid of Ai as he leads the remaining armed forces against the new mutations.