Update to original comment review, 2-10-2019:
I have never seen a bigger middle finger shoved up the reader's ass before.
This is..... to call this a dumpster fire is to insult actual comparatively respectable dumpster fires everywhere. I will include my original review below, which I wrote right before the author decided to just terminate it with the stupidest possible resolution ever, just for comparison. I only JUST remembered this series and looked it up and saw the horror. I originally called my review "This is romance done right." I am appalled. Everything that was there, was just abandoned for it to suddenly turn into a hentai with a worthless rushed ending, just completely out of the blue. It had a story, it had good characters, and then BAM. It's as ridiculous as that ending of Poochi, the fake extra Itchy and Scratchy character in the Simpsons when they wanted to write him out. It WOULD have been better if it had just ended with "and then they all went home to their home planets and then they died". That would have been BETTER, at least that would have made me laugh.
Original review (written September 7, 2018):
I really like this. The perfect guy fantasy IMHO. This is when it's done right.
The female lead is not a typical manga girl at all, even though the reader is tricked into thinking she is in the beginning, when she blackmails the male lead into cleaning her room for her. We think she's a spoiled, arrogant rich bitch who doesn't care one bit about him and sees him as a tool, but it turns out she actually is justified given her situation, relatively speaking (and it's give and take, because I'd say she very much improves his quality of life), because she has been abandoned by her family and is living alone, doesn't know how to take care of herself, is physically getting sick because of it, and is desperate for someone to help her. She's actually really nice to the male lead other than that one indiscretion and also never misconstrues his actions as what they're not, or uses violence or other threats. Her only shortcoming is that she's pretty clueless about practical understanding of a standard of what is socially acceptable behavior, but she's by no means mean or stupid, just an interesting character, an idiosyncratic sweetheart. She does some things that would overstep boundaries as most people would see them, but there is not a drop of malevolence in her, she is a genuinely good and nice person. Although she generally relies on him to help her out, she goes out of her way to try to make him happy when she can, and cares for him when he needs help, when it matters. Nor does she look down on the male lead for his poverty, social standing or get it in her head she can or should do better than him at the first opportunity like a real girl would. She is wholeheartedly head over heels for him without a shred of doubt, while he is the unpopular type who would normally never have gotten a girlfriend in the first place. His character is rather bland and conventional at the surface, and then all of a sudden he does something impressive, so you could say that he's SO good at being conventional that he's kind of a genius at it, and always knows how to remedy situations. But they're both really nice people and fairly intelligent, and that makes this manga highly unusual in my experience. They're an adorable couple and it's impossible not to ship them, they deserve each other, and hopefully they'll see it themselves, though for now they deny that they're boyfriend/girlfriend. They hold onto this excuse that she's supposedly holding onto him for his utility, but she is heartbroken when his father sends him an e-mail ending the conditions which made it necessary for the two of them to live together, and he is mostly quiet about what he wants, but presumably the only reason he was moving out was because he didn't want to be a freeloader, not because he actually wanted to move out. I think the suggestion is that he likes her just as much as she likes him, he's just very disciplined in his behavior.
I also like the art. The characters look less cartoony than usual, namely their features are more humanly proportioned than the anime norm, and yet she's really pretty.
It also has niche topic of cleaning, and how to clean, in much the same way gamble fish is about gambling, Elf-san wa Yaserarenai is about dieting, addicted to curry is about cooking, or Danberu nan kiro moteru is about weightlifting. This could be offputting to some since it's so specific and directed, but I don't think it goes overboard with it. But you can expect potentially genuinely useful information about how to clean in various situations mixed in with it, like what to do if you spill a large amount of cooking oil, what to really do about getting chewing gum out of clothes, or just how to attack a large and daunting problem where you don't know where to start. Which could be very useful.
This manga is wonderful. I can't see this not having something for everyone.