Many problems lie ahead for society in the 21st century. The best youths in the country are gathered at the super-elite Amakawa Noble School where they are trained to lead us to a brilliant future. They are led by five bishoujos known as ‘crowns’. One day, the leader of the crowns Saku was the target of a terrorist attack. She was saved by Shinri, who was invited to the school as the sixth crown. However, he is at odds with the school system. He vowed to do things under his accord and bring change to the school. Saku decided that she must keep an eye on him.