In the neon-lit underwater district of New Kyoto, a young octopus named Tako lived inside a glass tank that served as the brain of a floating chess arcade. Her eight arms drifted through cool, filtered water while holographic chess pieces flickered above her. Tako had learned to play chess by watching thousands of human customers, and she had developed a remarkable memory for openings and endgames. However, she had never played a real game herself, because octopuses were not allowed to compete in the human tournament. Every night, she watched the players and wished she could share her ideas with someone.
One rainy evening, a young girl named Mira sat down at the arcade's main console, looking worried. She whispered to her coach, "I can't remember the moves. My brain feels like it's full of static." Tako watched Mira's fingers tremble over the touchscreen. The octopus knew that the human brain is the body's control center, and that nerves send signals to and from it constantly. Therefore, when Mira hesitated, Tako decided to help by moving a small holographic knight on her own tank display. Mira noticed the glowing piece and smiled.