Kensaku to Enjin no Christmas (2019)
けんさくとえんじんのクリスマス（2019）
Synopsis
In Kensaku's bedroom, where he sleeps peacefully, the shadow of Enjin stands suspiciously... A heart-warming Christmas animation featuring Yahoo's official character "Enjin" and friends. (Source: Kensaku to Enjin Official YouTube Channel, translated)