The difference is whether you're eighteen or older...
This is a sweet romance between an eighteen-year-old young wife and her "uncle." Of course, "uncle" is just what the heroine calls the hero; in fact, they are no more than ten years apart in age...
And this "uncle" is also a big-shot CEO, so this is another love story between an arrogant CEO and a cute, innocent young woman... a legend?
This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.