Kamen Fuufu ~Onzoushi Wa Konya Mo Tsuma Wo Aisenai~

Mikoto, who has an old grandfather, decides to marry at a young age for his sake. Kazuki who becomes her husband is a president of a company. Moreover, he was her first love who supported Mikoto who lost her mother at a young age. "However, there is no remnant of the old days when I met Kazuki again", and Mikoto is treated ruthlessly from the first day of their marriage. "Even if I don't have love, I can be a good wife at least", Mikoto decides, but Kazuki is rumored to have a special relationship with another woman...!? A thrilling love story that mixes love and hate. Original Japanese version: https://www.berrys-cafe.jp/pc/book/n1530051/