The Comments Said My Younger Sister Was Going to Steal My Credit

I saved the heir of the Marquis's household, and he promised to repay me. Before I could claim my reward with the token, my younger sister desperately tried to stop me. "Sister, you can't go! They'll kill you!" As I stood there in shock, strange subtitles suddenly appeared. [The heroine really is a scheming black lotus. She came back reborn and stole her sister's credit, doing whatever it takes to climb the social ladder! Hahaha!] [The supporting female character is an idiot too. She believes everything the heroine says. No wonder she's just cannon fodder!] [But isn't what the heroine's doing a little wrong?] [What's wrong with it? In her previous life, the supporting female character watched the heroine die without lifting a finger. Shouldn't the heroine hate her?] Seeing me freeze, my sister said anxiously...