Based on the manga by the same name by Hiroyama Hiroshi, itself a spin-off of the Fate/stay night erotic visual novel by Type-Moon. Note: Bundled with the limited edition of the sixth Fate/Kaleid Liner Prisma Illya 3rei!! magical girl manga volume. (Source: AniDB)

One sunny day invaders came from space. They weren't little green men or funny girls wearing school uniforms, though. They were ugly robots which defeated the UN forces in seconds. After that the invaders (known as "eyeballs") roamed around and observed human society. In fact, they were peaceful unless attacked. They were polite and followed all the traffic laws, too. Still, they were aliens and the people of Earth wanted them to go home. The Kitanohashi High School Magic Club took it on themselves to defeat these foul robots and free the world. (Source: ANN)

An OVA bundled with the limited edition of the tankobon of the Kyou no Go no Ni manga. The staff and the cast of the OVA are the same as those of the Kyou no Go no Ni TV anime.

The limited-edition of the 26th manga volume will include an anime adaptation of the popular special flashback chapter "Uchi ga Kita Machi" (The Town Where I Arrived). The story reveals how Haruto, Akari, and Takashi first met during childhood, and serves as a prologue to the TV anime. The 27th limited-edition manga volume will include a special anime episode produced in full cooperation with Seo Kouji. This OVA will be the animation of the end of the manga. (Volume 27 is the final volume of the long-running series.)