When Keita frees Whisper, a ghost-like youkai, from 190 years of imprisonment, Whisper pledges to protect Keita from supernatural dangers. Whisper also gives Keita a watch that allows Keita to see other youkai. Together with the twin-tailed cat spirit Jibanyan, they encounter many youkai-related problems and solve them. --- Official Release: - English Asia release by Shogakukan Asia - Singapore - English North America release by Viz Media - Indonesian release by Elex Media - Spanish release by Norma Editorial - Latin-American release by Panini