Sleipnir

"The Sixth Dimension Experiment." The experiment attempted to open one of the eleven dimensions in our reality.  It resulted in a catastrophic explosion that killed 110 million people and left 12 countries in ruins. The head of the experiment has been banished from reality for eternity. The world leaders formed a monitoring agency known as "Zeien" to keep control of all scientists and technology in order to prevent another attempt.  10 years have passed since the incident. Takaomi Yuki notices a change in the "Time Machine Destination" that his older sister has given him before her banishment. Suddenly, the device summons a lively young girl in armor.  To uncover the truth, the two will begin an adventure that crosses time and space.