I am in Ultra: I become stronger when I break other people's defenses

Qi Li, a self-proclaimed innocent Ultraman fan, accidentally traveled to the Ultraman world's Galaxy TV and became a dark Ultraman who was being hunted. He had just unlocked a powerful combat power through the system, but was told that he only had half a year left to live, and he had to absorb negative energy to increase his lifespan. Isn't this forcing people to be villains? As we all know, being a villain in an Ultraman drama doesn't end well. Until he found out that doing righteous things can also absorb negative energy. At this point, an Ultraman who made the light team laugh and cry and the dark team hate him appeared! (New Generation Theater, the timeline and character settings are slightly adjusted according to the author, please be careful if you don't like it, thank you...