No System, an original Ultraman, and the protagonist isn't Tiga. Taigu was just watching a Tiga video on his way home late at night when he left this comment: “Back in the day, I lent Tiga the light inside me, and now I'm left in total darkness. It's been so many years, Tiga. Give me my light back!”
The moment Taigu posted the comment, he felt an incredibly dazzling light appear up ahead!
It was even brighter than the light that surrounded Tiga when he transformed. Taigu instinctively squinted and raised a hand to shield his eyes.
“Is that light?” Could Tiga really have heard him and come to return his light?
The light drew closer and closer. Only then did Taigu realize it wasn't light at all, but a massive truck weighing a hundred tons!
Its headlights shone like two suns, bright enough to blind him.
Tiga: “Just tell me, is it light or not?”
Diga, please give me back!