Bakuoka Danjuurou, a man who suddenly appeared in the world of mahjong, is a professional mahjong player who uses a powerful yet incomprehensible method that he calls "Explosive Tile" to break into the world of professional mahjong players. The professionals were initially repulsed by Bakuoka's absurdity according to conventional theory, but his continued unbeaten record soon became a high wall standing in the way. The same is true for Teppeki Tamotsu, who happened to get acquainted with Bakuoka when he was still unknown in the mahjong world, and was attracted by his strength and became a professional. Can the ordinary man, Teppeki, beat the genius, Bakuoka? Teppeki makes steady progress in his attack on the mysterious "Explosive Tile" technique used by Bakuoka, which at first seems impossible...