Dual Parallel Trouble Adventures

DUAL! Parallel Trouble Adventure takes place in two different possible universes. In one world, a huge alien artifact is ignored and broken apart by a construction company, its main component tossed away by a worker named Yotsuga. In the other, Yotsuga keeps the artifact, leading to the discovery of extraterrestrial technology that completely changes the course of history.

Kazuki Yotsuga (probably the son of the Yotsuga in the opening scene) is the main character of the show. Kazuki is shunned by other students because of his web site, where he describes battles between giant robots that only he can see. He is surprised when Mitsuki Sanada, the most popular girl in school, approaches him one day to tell him that she shares his interest. This is only a ruse, however; her father wishes to study Kazuki for his research on parallel worlds.