When Keita frees Whisper, a ghost-like yōkai, 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 yōkai. Together with the twin-tailed cat spirit Jibanyan, they encounter lots of yōkai-related problems and solve them.
戸松遥
as Keita Amano (voice)
関智一
as Whisper (voice)
小桜エツコ
as Jibanyan (voice)
悠木碧
as Inaho Misora (voice)
重本ことり
as Usapyon (voice)
梶裕貴
as Fuyunyan (voice)
木村良平
as King Enma (voice)
堀ちえみ
as Chiaki-senpai (voice)
寺崎裕香
as Yûto (voice)
吉野裕行
as Demon Okure (voice)
子安武人
as Nurarihyon / Great Youkai Nura Neira (voice)
遠藤綾
as Komasan / Komajiro (voice)
