Touhai: Ura Rate Mahjong Touhai Roku

No one has a clue that the world’s most talented and intelligent player of Mahjong is just a high school boy. Kei is a teenager with some amazing ability of observations that can play Mahjong. He spends most of his time playing that and no one can defeat him in it. He is still waiting for the opponent that can compete with him. Then a girl came into his life. She was with him because she illegally entered the country. Now he was protecting her from being traced.