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Mary Siringa has finally realized the error of her ways as a spoiled burden to her family. In her search for a job, she runs into Prince Grandiel, disguised as his alter ego, Nepenthes. Intrigued by Mary, Grandiel draws up a magical contract for her to be a maid in the imperial palace and work as his spy. Now, Mary must protect Grandiel's secret identity and comply with the other clauses of her contract, or else her heart will explode! Can Mary keep her true self hidden, or will she die trying?
The culprit who briefly appeared in the novel's side story and turned the twins, her cousins, into villains! ...Who would have known I would be reincarnated as that person? I sighed deeply and made a vow. "Let's raise the twins with love and make sure they don't turn into villains!" Ignoring the novel, I decided to get along with the twins, but the secondary male lead, who I thought would have no involvement, started getting obsessed over me! Ah, where did things go wrong? Moreover, I was only trying to prevent the twins from turning into villains, so why did the secondary male lead end up a villain instead? "Please, please don't spiral away any further. I don't know how much longer I can endure this."