First Night With Duke GN Vol 01
One morning, a girl wakes up and discovers she'd been transported into a romance novel as Lady Ripley, a count's daughter, and a minor character. She decides to kick back and enjoy a life of luxury in the novel's background to the fullest! But then she goes to a party and makes a huge mistake. The last thing she remembers is when she started drinking… And when she came to her senses, she was in bed with the stone-hearted main character, Duke Zeronis d'Inglid!