It's quite certain that Kami nomi zo Shiru Sekai fans with the K-ON fan spirit within them would jump for joy if they saw this OVA. But K-ON doesn't have what this Kami nomi zo Shiru Sekai OVA has: Comedy and Romance.
The concept was quite excellent. And at the end credits, I actually wished that they would continue this OVA as a mini series in the anime. There were so many things that they could've done with the characters.
Thanks for taking the time for reading this first-time reviewer's review and have a good day!