Ayakashi User Ayakashi : Season 1 Episode 4

When a mysterious girl named Orie shows up at the school, Yuu and Hime begin asking questions about her. The problem is, no one can see her except them, Eimu, and Kajiwara. That is the least of the problems when the vice principal goes missing and no one remembers him. Not thinking anything about it, Yuu continues the school day normally. That is until Hime disappears and no one remembers her as well. Now Yuu must find the culprit and save Hime, before she is gone forever.