History's Next Mightiest Disciple

Kenichi and his fiancé Miu are no longer disciples. Nothing exciting has happened recently, and the inhabitants of Ryozanpaku are getting bored- until a kid who seems to be perfect disciple material comes tumbling onto their doorstep. With a new Yami forming and the beginning of an all-out war becoming clear, can a bitter American teenager become History's next Mightiest Disciple?