Renai Fuyona Konin no Hazudesuga, Gunjin Koshaku-sama ni Mainichi Amayakasarete mo Yoroshii Nodeshou ka?

Raised strictly, Minerva followed her stepmother's teachings, never smiling, never dressing stylishly, and having no friends. Even after marrying Duke Adolf in a political marriage, he tells her he has no intention of loving her. So, Minerva tries to become the perfect lady, enduring many hardships. But Adolf sees a moment when she can't resist sweets and notices something unnatural about her...? Adolf, who had been keeping his distance because he thought she hated him, starts to spoil her more and more, finding her "honest and cute"!?