My Junior Sister Hates Pain But Fights Like a Demon

Yun Cinu dies from pulling an all-nighter writing her own novel—then wakes up inside it as the villain whose spiritual roots are about to be ripped out by the heroine. Her solution? Stab first, ask questions later! Armed with knowledge of the original plot, she's determined to save her sect from its doomed fate. But there's one problem: the story is already broken. The brooding senior brother who was supposed to die for the heroine now lectures her about dodging punches instead of chasing romance. The second senior brother who should've destroyed everything for love is suspiciously indifferent…