After thousands of years of being in hiding after the basic destruction of the world, humans have returned to the land to create an new reality, a newer .. better one.

This world that they live in , is a cyber punk world, full of technology, robots lights.. but a lot of danger, every human has to bring gas masks with them,since the old humans left them with.

Gakupo is the leader of a gang 'the black rose', a gang that is trying to take over Tokyo city.