Eiga Youkai Watch: Shadowside - Oni-ou no Fukkatsu

A 11-year-old boy named Keita Amano once possessed a wristwatch capable of commanding Youkai, using it to befriend them and accomplish many feats. As he aged, he lost the ability to see Youkai, and the watch, deemed a threat to the balance between worlds, was discarded into a void beyond time and space. Over time, the watch became a legend. Centuries later, a Youkai virus called Onimaro emerges, infecting people with malicious intent and transforming them into Kaodeka Oni, spreading chaos. As destruction looms, only those chosen by a new Youkai Watch can confront the threat and prevent the downfall of both Youkai and humans.