Yuru Yuri DVD/BD special. Chinatsu's horrendous and atrocious drawings come to life in a tale about a handsome prince, a hideous girl and true love! (Source: Anime-Planet)

A DVD Special of Haiyoru! Nyaruani: Remember My Love(craft-sensei) which is also episode 12 of the series and takes place after the last episode of the anime.

There is a magical academy that is located on a floating island in the sky. This OVA is about the students of one of the academy's classes, who's only chance not to fail the semester is to win a competition where they must show off their magic skills.

A ghost was seen on the 12th floor of the Asakusa Juunikai building. A newspaper article featuring the sighting brought together Takuboku Ishikawa, who runs a private detective agency to support his family, and his assistant Kyosuke Kindaichi to solve the case. (Source: MAL News)