The winding coastline is the edge of the town of Arakawa. This city that can only survive the rumbling of broken machines has two children called "cats". The name "Xiao Hei" is full of fighting spirit and hostility. The street bully, whose name is "Xiao Bai" is so simple that he is almost idiot, always dragging his dirty nose to live regardless of the past and the future. Like most teenagers who wander on the streets of Takaracho, Xiao Hei and Xiao Bai are both homeless orphans and the most unrestrained ghosts in the city. They aim to fight against religious madness and fight with the vagrant. They are mixed without cause. Evil and innocence make people a headache.
Black and White never seriously considered the future of Takaracho until a company called "Kiddy Kastle" came here and announced that they would razor the old house to the ground and rebuild Takaracho according to the plan. The trainers realized it was them. It's time to stand up for this city that represents their lives and souls-and also to fight the demons inside.
