70'S: a Coquettish Savant Marries an Educated Young Man from the Countryside

[Selfish and sickly female protagonist x taciturn and highly intelligent genius male protagonist] Ye Wanqing almost drowned as soon as she traveled through time, only to find out that the original owner was killed by her cousin and fiancé, an adulterer and an adulterous couple. After finally being bound to an unreliable system, it turns out that this system has no other uses except for a useless blind box reward. The worst thing was that her soul was unstable and she would turn into a little white cat at night. Fortunately, she met a good owner who took good care of her and fed her milk with his own hands. But master, I am just your cat! Why do you always like to hug me, even when I'm a human?