After transmigrating to Japan, Lin Lu Kuihuazi, a Japanese girl, got bound to a "pick-a-fight" System. Not the usual kind of nitpicking, but the fiery, face-to-face kind.
For example, a protagonist's rise to greatness always has obstacles in the way: clueless NPC characters who must be thoroughly taught a lesson by the protagonist to give the audience a satisfying payoff.
After transmigrating, Lin Lu Kuihuazi still didn't know that this wasn't a world where she would simply help one protagonist, but a world teeming with protagonists.
For instance, she never imagined that she'd run into a target character just by randomly going to a restaurant for a meal. The System in her head would then issue a mission: [At 45 degrees to your front left, you've run into the protagonist's group. You catch a glimpse of their dashing figure on the tennis court and decide their skills are nowhere near good enough. You could do better!]
Lin Lu Kuihuazi: ...
How am I supposed to catch a glimpse of them, and I don't even know how to play tennis!!!
Another example: she just wanted to relax at an aquarium, but instead ran into a murder case. As a law-abiding citizen, all she had to do was cooperate with the investigation. Who knew the System would pull another stunt? [See that ordinary-looking kid? He's your eternal rival, someone you can never surpass. But this time, you think you might be able to solve the case faster than him. Go compete!]
Lin Lu Kuihuazi: ...
How is this supposed to be exciting?
Theme: Be down-to-earth, don't show off
