When the creator of a popular video game system dies, a virtual contest is created to compete for his fortune.

Ruka is a young girl whose parents are separated and whose father works in an aquarium. When two boys, Umi and Sora, who were raised in the sea by dugongs,…

Madarame Baku is a mysterious gambler. His nickname is Usogui (literally The Lie Eater). Club Kakerou is the top illegal gambling den, where gamblers vie to become the best in…