Is My Sister a Wicked Female Lead? I'll Help Her Slaughter Them All

“After transmigrating into a book as the useless younger brother raised by my ‘sister,’ I hadn’t even had time to enjoy my life as her ‘freeloader’ before I watched her personally feed a contract worth 500 million yuan into the shredder for the male lead.” Originally, my sister, who ruled the biggest gang in the city, was just about to lead the company through a successful transformation... But then the male lead, who could choose people to hear his inner thoughts, and the female lead, who had an Emotion Collection System, showed up. Little by little, my sister, once a brilliant woman, lost her wits and became a vicious supporting female character. A vicious supporting female character? And our leads are both reborn, with two golden fingers between them! How could that possibly end well? Wait, I haven’t even had time to enjoy my life as a rich second-generation kid, and now I’m on the verge of bankruptcy? And saddled with a mountain of debt? The male lead? I don’t care who you are! You messed with my money! I’ll buy up your family business and take over your company before you can: “Begging me to slap you? Please, I’m afraid you’ll enjoy it!” The female lead? Don’t give me that fake-sweet talk! I have osteoporosis. I don’t drink tea! “What do you mean, ‘From now on, you’ll dance only for me and play the zither only for me’?” Get lost! I don’t want to work that hard. As an NPC in an NPC’s story, all I want is to hide away in a chapter nobody cares about, enjoy the empire my sister built for me, and lie flat.