After a handful of chapters, I couldn't read anymore. Alone, the kid's reactions are hilarious and charming. However, when you pair his reactions with the way the maid reacts, it just comes across as creepy.
If you want a similar vibe without the weird age gap, please read Jijyou wo Shiranai Tenkousei ga Guigui Kuru. It is very wholesome and cozy.