A crossover of Overlord and Kage no Jitsuryokusha ni Naritakute! packaged in a Studio PuYuKAI style ONA. It's just like Ple Ple Pleiades or Isekai Quartet.The crossover actually fits quite well as both main characters are overpowered evil bosses in their worlds. The ONA consists of short funny interactions between the characters from the two anime. Unfortunately, I'm a bit tired of all isekais, which means that my personal interest is no longer there and I probably can't form a fair opinion, so I don't see myself in a position to criticise anything except that I personally was a bit deinterested. Nevertheless, I wanted towrite this review and say for myself that it was ok. It might be nice to watch if you are a fan of both series. Apart from that, there is nothing else special to mention.