According to Kodansha, a 12 minute long OVA of light novel "Mahou Tsukai Nara Miso o Kue!" was released on Youtube.

Mahou Tsukai Nara Miso o Kue! official website
Short OVA on Youtube

"Mahou Tsukai Nara Miso o Kue!" (Eat miso if you are sorcerer!) is the grand prize winner of the 1st Kodansha Lanove Bunko Rookie's Award.

Staff
Director: Bessho Makoto ("Shangri-La")
Character Design: Oshima Miwa
Production Studio: AIC

Cast
Shota: Suzuki Tatsuhisa
Artemisia: Hidaka Rina
Celestine: Nakahara Mai
Manuela: Hirohashi Ryo
Narrator: Tachiki Fumihiko

Synopsis:
During the WWII, the discovery of magic propelled the world to research the destructive psychic power. However, Japanese soybean paste miso was found to cancel the effect of magic. Now the magic has been regarded as one of the common technologies. Hacchoya Shota is a high school boy who goes to a magic school. One morning, when Shota is eating a miso soup, a girl called Artemisia breaks into the house smashing the window. She is the princess of Magiele Kingdom, where the magic was originated from.

Mahou Tsukai Nara Miso o Kue! on MAL