Not many people know that one of the most talented and ruthless Mahjong players in town is a young high school student. Kei is a teenager of few words, but his observation skills, unbreakable will, and gaming expertise allow him to survive in a world filled with powerful, rich, and dangerous characters. Kei is currently hiding a girl named Amina who entered the country illegally and protecting her from deportation. He spends his days sleeping through class and his nights playing a high-stakes game of Mahjong, waiting for a worthy opponent to arrive.