Ple Ple Pleiades × Kage-Jitsu!

Synopsis

For various reasons, Mr. Ainz and Shadow-sama have swapped bodies! --But no one has noticed! It doesn't matter if the master has switched! "Overlord" and "Kage no Jitsuryokusha ni Naritakute!" Halloween collaboration of two anime series with chibi characters! (Source: YouTube Description, Translated)

Trailer