The difference is whether you are over 18 years old or not...
This is a sweet relationship between an eighteen-year-old wife and an "uncle". Of course, this so-called uncle is the name the heroine calls the hero. In fact, the age difference between them is not more than ten years...
Moreover, this "uncle" is also the CEO of a company, so this is another love story between a arrogant CEO and a cute girl... A legend?
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.