As AMetroid points out and as should be expected from Harumi Chihiro, the manga spends a lot of time on sex scenes, that, although inexplicit, don't leave overly much to the imagination. Spending more time on the story would be welcome. Nevertheless the story comes through reasonably well, more than well enough for a light entertainment.
The art is well drawn: not only neat and easy to follow but also just generally pleasant to admire. I also agree with Darknemo, the characters are well made, the salary man hero as well as our not-so-typical tsundere heroine.
Further to that, the plot (as far as the 9th chapter) is intriguing and has a mix of slice-of-life, slowly developing romance between the hero and heroine, hints at their pasts and a bit of foreshadowing for suspense. The exploration of love, friendship, sex and money is far from brilliantly unique so dont expect this to manga to change your world philosophy but it is very well executed and has its touching moments.
All in all, a very good read. Recommended.