You're back in the world you already love, watching Yuuri be a disaster at diplomacy while his crew keeps him from burning everything down. These five episodes don't chase plot, they're just the cast being themselves, which is exactly what you wanted after the series ended. The comedy lands because everyone's been living in this world long enough that the jokes don't need explanation. If you watched Kyou Kara Maoh for the banter and the warmth, not the stakes, this is what comfort watching actually looks like.

Peace has more or less returned, and Yuuri Shibuya, the Maou, sets out to check on how things are going across the land. On his travels he crosses paths with Sararegi, ruler of Small Shimeron, whose friendly manner may conceal other intentions. When Yuuri returns to Shimaron for some rest and time with friends, Sararegi abruptly attaches himself to the party and presses the Maou to visit his kingdom. Meanwhile, the original king gets word to Yuuri's brother and a companion of his that Yuuri is in danger. The result is a five-episode fantasy adventure OVA with a comedic streak.