Super Robot Taisen Gaiden

The world of La Gias, situated inside our Earth, is on the brink of destruction. The Holy Kingdom of Langran has ruled over the lands for centuries, but its days are numbered. Seers and scholars predict that the kingdom will fall within 10 years, threatening the very existence of their world. In an effort to prevent this catastrophic event, Langran creates powerful machines called the Masou Kishin, which are controlled by pilots' sheer willpower. However, most people in Langran lack the necessary willpower to control these massive mechanical beings.