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Folks I'm desperate. I'm looking for a villain/villainess novel where at one point the ML uses a magic music box against the FL to make her fall asleep whenever he plays it and she can't sleep without it. She tricks a maid into getting tied to it and escapes from his estate where she'd been for weeks.
Is it this manga? Do you know which one it is? I've been searching for months. （/TДT)/ please help me