Kei

榊原圭 (Sakakibara Kei) leads a double life as an ordinary high schooler by day and a dominant force in underground mahjong parlors by night. His ruthless, calculating approach to the game earned him the feared nickname 'Ice K'. Blessed with an extraordinary memory and shaped by a tragic childhood that drove him to suppress emotion in favor of pure logic, he operates with cold precision. To shield an undocumented girl named Amina, he plunges into the brutal world of underground gambling—where the stakes go beyond money and even extend to one's own organs—fighting to survive each merciless match.