The story line is pretty common--damaged rich boy hurts poor girl, girl wants revenge. Although it isn't too clear that her revenge is fulfilled on first reading. However, if you look a little further you can somewhat see it. A little more development in that area would have made it easier to understand.
Don't get me wrong this isn't a whole back and forth revenge thing. The male lead, Yoshito's, brothers add humor to our constantly picked on heroine who is strong willed, honest and fun, while at the same time being soft and sympathizing. Instead of giving in to Yoshito's distrusts she pushes and challenges him.
I can't comment too much on the art, in one cel the body position looked awkward but all in all I enjoyed looking at everyone and everything. The drawings are simple with clean lines and a clear picture.
I thoroughly enjoyed the story and really liked how the end was presented, it suited the story and the characters.
I would have loved to see this as more than a one shot.