Boku no Tsuma wa Kanjou ga nai

Synopsis

From Seven Seas:
Takuma is a single guy who does nothing but go to work and come home. Too tired to do chores, he decides to get a robot to cook and keep house. “Mina-chan” is such a good housekeeper, Takuma jokes that she should become his wife. Mina takes Takuma’s joke seriously, and slowly the two start doing more things together, like having a picnic outside. As time goes by, Takuma starts to fall for Mina, but can a human and a robot ever have an equal, loving relationship?

Original manga

Synopsis & details from MangaUpdates