Segyegwan Choegangjadeuri Naege Jipchakanda

At 13, Dahlia Phesterose recalls her past life. She realizes she was born as the sister of the ultimate villain in a dating simulation game where the male leads, or "transcendents," all succumb to madness. Anticipating family ruin and personal peril from her estranged brother, Dahlia is desperate to escape. However, after luckily earning her terrifying brother's favor upon his return home, a new twist unfolds: she unwantedly captivates the world's strongest, the soon-to-be-mad male leads!
(Source: Tapas)