Sorry, Heroines, I Really Don’t Want to Be a Green Tea Girl

I woke up to find myself—a mere bystander—reincarnated as a minor female NPC in a video game?! Not only had my gender flipped, but the System also informed me that I was about to be erased immediately due to a complete lack of "screen time"? "The male lead has already locked onto someone else's route, so where exactly do you expect to get any screen time? Our system memory is running critically low, so we have no choice but to delete all these 'background characters'!" "Hmm... However, if you can stop the other heroines from getting 'conquered' by the male lead—thereby preventing them from entering their individual character routes—then, and only then, will you actually have a role to play...