Revenge With The Demon King

she, an infamous fool in the capital, a loser in everyone’s eyes, is set up by her vicious elder sister and perishes. when she wakes up, a modern girl’s soul is reincarnated in her body. from then, she is no longer the pushover but becomes “the avenger”. her vile-hearted sister and heartless fianc must kneel before her and beg for their lives!