One regular Tokyo morning, passengers suddenly find themselves fighting for their very survival when their train car jumps into an apocalyptic future.

Koko grows up in the jungle with a solitary Zarude. When he meets Ash and Pikachu, he discovers the human world — and a plot threatening his home!

Days before graduation, an unassuming teacher takes his class hostage: he's determined to confront the truth about their classmate who died by suicide.