Episode 7 is where the show starts to get serious. We're past the early setup episodes, and the plot is finally moving. The party has been gathered, the world is established, and the villains are ready to make their move. The Doom of Darkness is probably going to be a major blow to the good guys. It sets up the second half of the OVA, where the party has to rally and find a way to stop the demons for good. The show is a slow burn, but the payoff is coming.