It's sometime in the future and the story starts off with Kei and Ai running for their lives. Ai is a little girl who holds a terrible secret which could destroy the current world. The world is now populated by Headmeters, people who have psychic powers and their strength is shown on their forehead when they fight. However, Kei was an experimental subject and his strength never went above level 5 while other surpasses his ability effortlessly. While escaping, when in desperate moments, Kei could increase his ability to infinity when Ai is in trouble. The one who's after her have a deep secret, aided by a small dwarflike man living in a robotic suit. Eventually Ai is captured and Kei, a sherlock holmes detective and another Headmeter who was converted to the good side when Kei unleashed his horrible powers through Ai must go and rescue her. Together they must save Ai and the secret which she holds. What is the secret of Ai? Who is she? (Source: AniDB)

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.

Shiro is a dim-witted albino bear who lives with his mother and siblings in a remote forest, fishing and hunting for food on a daily basis. One day, a chance encounter with a tortoise leads the family to take an unexpected adventure far from their home. As they encounter various mysterious artifacts on their way back to the forest, they unexpectedly stumble upon a peculiar and unique sight: an abandoned city.

When the Neighbor's Club struggles to find an activity to do, Kodaka Hasegawa suggests they pass the time by writing a round-robin story—a narrative where everyone takes turns writing a section. But as they begin the project, chaos ensues as every member writes the story according to their personal preferences while trying to outdo each other. At this rate, will the story ever reach a fitting conclusion?