Julienne no Nayameru Kenshin

Sixteen-year-old Julienne and her younger sister were despised by the whole town. They'd been born to a prostitute, so Julienne was sure their fates would never change. Then one day she met Cristiano, a wealthy Italian millionaire. Just as Julienne was about to sell herself to survive, Cristiano saved her and gave her a place to live, an education and even a job. She knew it would be foolish to fall in love with him. But ten years after their first encounter, Julienne offers Cristiano her virginity and then immediately disappears from his life... (Source: Renta!)