That dude is not normal. I bet he's a reincarnator. He might have even been a woman in his previous life. Not because he can clean and cook, men can do that as well, but because he puts zero distance between himself and a woman he had never met before, and also otherwise the subtleties of his behavior. In fact he should have been a grandma with grandchildren, so looking at Kotoha, he sees just a cute kid. Most likely in that previous life, she (back then) would have liked to become an accomplished professional chef, but the realities of the society made her a housewife. So now that there's a new chance to live a life from the beginning, he's going to become a chef.