Ultraman Galaxy: The World of Tiga

One ordinary day, two students inexplicably decide to duel. For some unknown reason, both students vanish in the middle of the fight. In an unknown space, one falls into darkness and accepts the dark power of an enemy defeated by Ultraman Galaxy, merging with it to become Dark Lugiel. The other walks toward the light and, in that same unknown space, accepts a blue power that merges with him and turns him into an Ultraman! What will happen in the end? Let us wait and see!