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)

Shun Asanaga is a 15-year-old junior high school student with an optimistic and bright personality. One day, he finds a mysterious crystal in the office of his father, who is a scientist and businessman. When Shun touches it, the world becomes distorted, and he is sent into the world of Endra. Emilio, a prince of the kingdom of Endra, is nearing his 16th birthday and despises the reigning king, Delzain. Since Emilio is now at the age when he can inherit the throne, he takes up a weapon and attempts revenge. However, because Emilio is too weak, he is captured by Delzain and put in prison. When Emilio is in grief, the wall of his cell becomes distorted and Shun appears from there with two goals: return to his own world, and complete Emilio's revenge. What future lies ahead for the two boys trying to survive in Endra, yet raised in two different worlds?

Ginya Otonashi is a college dropout who works part-time for a pachislot publishing company while aspiring to become a novelist. One day, Ginya comes across a secret organization and gets pulled into a competition to become #1 in "Pachi Battle," which is all a part of the Slotseum, a pachislot competition.