Mangas

The Cinder Twins will Save the World without Black or White. -  灰の双子は白黒つけずに世界を救います。
14 years have passed since the White Hero's and the Black Demon King's decisive conflict during the war of Black and White. The world, now lacking a Hero, was dominated by self-proclaimed "Heroes" who were showing off their power. However, some mysterious twins turn the tables around with their wisdom and ability...!