Benesse Corporation has distributed a promotional OVA for their correspondence education service "Shinken Semi High School Course". Benesse has been well-known for spending large amount of money on direct‐mail advertising.

OVA Part 1 (Youtube)
Part 2
Part 3

Staff
Director: Jinbo Masato (episode director of "Toaru Majutsu no Index II")
Original Character Design: Takata Koutaro
Anime Character Design & General Graphic Director: Matsui Yuko (key animator of "Kami nomi zo Shiru Sekai")
Production Studio: Manglobe

Cast
Irino Miyu
Hirano Aya
Taniyama Kisho
Nakai Kazuya