Sihanbu Heungmagi Nae Pahoneul Huwonhanda

Waking up in a novel is bad enough, but being the villainess Daphne Peregrine is even worse! Knowing the doomed character's fate, Daphne starts mending her strained relationship with her family, hoping they'll let her move to a peaceful land. Since she'll need money, Daphne asks the enigmatic Archduke Luciel Gresbel to go into the antidote-making business with her so she can use his noble connections. Will the original Daphne's past misdeeds ruin her plans, or can she dodge her untimely death?
(Source: Tapas)