Toki no Daichi: Hana no Oukoku no Majo

In the past, the world was bundled with demons by the evil dragon Diabolos, and demons were ferocious. However, 14 years ago, Diabolos is defeated by Zard, a boy who was called a hero at the age of seven at the time. He calmed down the demons, and returned the world back to its peaceful state. Four years later, however, Diabolos was resurrected and the demons began to attack the world once again. ...