Riberhaw: Gambit Mission

Rui Zhu was lost on the planet Erde, where strange creatures ruled every corner. One of them is Vacuumor, an invisible bat that can create a vacuum. Those strange creatures have appeared since the opening of the gate between Earth and Erde, when a great war claimed millions of lives on Earth.

She was forced to disguise herself as their resident, becoming a student at Vatuma, a high school established amidst the chaos on Erde, which would help the residents survive alongside the dangerous creatures. Zayn Rix, the one who got her there. He walks quietly through the school compound, wearing a Huizi ring that gives special powers to his umbrella sword, Sanza. He is relied upon by President Wu Peng to close the gates or send him as a secret agent to keep peace on Earth.