The story follows a young man named Kazuya Shibuya who receives an anonymous email message out of the blue one day: "Won't you join the Savanna Game?" The message is an invitation to a state-sanctioned killing game — a deadly role-playing game designed to motivate the inhibited youth of modern Japan. ... more>>

Shibuya and his two friends Kotegawa and Kudou find themselves in bizarre battles that span the space-time continuum, with everything from dragons to the Shinsengumi force of the shogunate era. <<less

Mamoru, an ordinary college student, comes across a mysterious item in the process of searching for the missing father of his childhood friend Yuuka. It's... more>> a "human card" that traps people in a single sheet of paper and allows you to trade them! A terrifying human trading suspense begins! <<less