Youkai Watch: Shadow Side

Years after the adventures that once surrounded the Yo-kai Watch, the next generation of the Amano family is growing up in a city where supernatural trouble has not disappeared. Natsume Amano works with Touma Tsukinami and Akinori Arihoshi through a Yo-kai detective agency, investigating incidents tied to spirits whose darker Shadowside forms can be genuinely dangerous.

Natsume's younger brother Keisuke dismisses the supernatural until her repeated late returns make him secretly follow her. What he discovers destroys that skepticism in a single night. Now aware of his sister's hidden work, Keisuke is drawn into investigations where a harmless rumor may conceal a hostile Yo-kai and where understanding the spirit can be just as important as defeating it.