I Travel Across the Universe by Picking up Rags

Dawn has a king system, the full name of the system is the Tattered King System. The more rubbish you pick up, the stronger Dawn becomes. She appears to be an interstellar vagabond, making a living by picking up rags on a deserted planet and working diligently for three years. The alien Zerg attack broke Dawn's peaceful life. Due to his meritorious service in helping the army wipe out the Zerg, Li Ming changed his identity and became a student of the Imperial Academy. For Li Ming, it was nothing more than picking up rags in a different place. Unfortunately, the peaceful life did not last long. The Space Hegemony Tournament is coming soon, and Dawn, who is picking up rags, is pranked and forced to become a contestant. Li Ming frowned: I just want to pick up rags quietly, no cues. She had no choice but to come on stage and control the mecha to kill everyone. Students who are ready to watch a good show: What about the promised useless people who are ignorant and incompetent? ! [The female protagonist with maximum combat power, the male protagonist's background, there won't be many emotional scenes, it's an imaginary setting, no conflict with reality, and it's a cool story without logic. Star x Mecha x Zerg