Tekkonkinkreet , also known as Black & White, is a Japanese manga series written and illustrated by Taiyō Matsumoto, originally serialized from 1993 to 1994 in Shogakukan's seinen manga magazine Big Comic Spirits. The story takes place in the fictional city of Takaramachi and centers on a pair of orphaned street kids – the tough, canny Black and the childish, innocent White, together known as the Cats – as they deal with yakuza attempting to take over Treasure Town.