Straight to the point.
Story: 6/10
One of the most used plots in the josei genre, same as in Harlequin manga.
The heroine (Faith) confronts the hero (Stone) who was her guardian, that she wants to pay him back everything she owes him, (girl he has billions on his account) and work hard to realize her dream, but he thinks she's too immature and naive. (and she is).
As "the wheels of fate turn," (also typical josei plot) Stone is given the standard josei condition/plot maker (from his mother, the CEO of the company he wants) to marry somebody and live with that woman for a year in order to inherit the company. Guess who will he pick?
Characters 6/10:
Stone (30): The drop dead gorgeous bachelor, chased by countless women, rich as well, something typical for josei manga; Has feelings towards the heroine he hid because of their age difference.
Faith (20): An earnest heroine, who is clueless and in love with Stone since she was a teen. Naive and good, as well. (So about 85% of the typical josei heroines).
Art: 6/10
Art is acceptable, I somewhat like the way characters are drawn. It's not perfect, but I've seen worse.
Overall: 6/10
One of the classic, kinda Cinderella, stories with the expected plot for somebody who read countless josei manga like me. For somebody who is just starting, it's a good one, sweet, and the hero is not a huge jerk.