A motorcycle accident in the city will be the precursor to a series of bizarre phenomena being revealed consecutively. Meanwhile, a girl named Yoko possesses a second sight which allows her to see strange things invisible to others.

After trying to rescue a man on the subway tracks, two teens wake up in a room dominated by a mysterious black sphere that sends them to hunt down and kill aliens hiding on Earth.

While fooling around with a self-made crossbow, Kira accidentally kills his classmate Itsuki. For lack of evidence, the young student is found innocent. However, his trial is widely covered by the mass media, and the following uproar from society won’t leave his family untouched.