Kimi wa Cinderella: Kokou na Onzoushi ga Taema Naku Ai wo Sosogu Riyuu

Having lost her parents at a young age, Miharu was treated like a housekeeper by her uncle's family, the Samejima family. One day, Kanato, the heir to the Kuronagi conglomerate, comes to visit the Samejima house for work. Upon learning of Miharu's circumstances, Kanato unexpectedly proposes to her...!? Taking Kanato's hand, Miharu decides to leave the Samejima house. From then on, her days are filled with luxurious dinners, beautiful dresses, and Kanato's kindness, and she is overwhelmed with boundless affection... This marriage is filled with the highest level of love—the story of what happens after Cinderella marries her prince. (Source: Starts Publishing, translated)