My Senior Sister Has Gone Berserk

I'm all alone raising my younger sister, weak, pitiful, and helpless. My sister gets bullied, too. By a stroke of luck, a powerful figure from an ancient battlefield takes me on as a disciple. I was all set to slaughter my way through the world, but I never expected to still be a weakling who has to rely on my senior sister to save me. She looks harmless, but who knew she's a ruthless devil who kills without batting an eye? Senior Sister, save me! Lin Bingluo is the GOAT!

This novel and its characters are entirely fictional. Any resemblance to actual persons or events is purely coincidental. Please do not imitate.