At the Beginning, Tiga Died and I Picked up the Divine Light Rod.

Wu Di was watching Ultraman Tiga recalling his childhood at home. A meteor flashed outside the window, and time and space were distorted. When he opened his eyes again, he found that he had arrived in the Tiga universe. Tiga was fighting Gatanjie. He thought it was the end, but unexpectedly it was the beginning...