This is one of those little known series that deserve more recognition. It's also one of my favorite manga series (partly due to the fact that it's the first manga I've read) (or manhwa)

Story: 7/10
This series actually has a decent overall plot for a harem manga. It's definitely unique and no doubt has a lot of potential, but it does suffer from a somewhat episodic path, with no clear antagonists defined (as of now).

Art: 9/10
As expected of Lim Dall-Young and Lee Soo-Hyun, the artwork is essentially eye candy and is overall spectacular.

Characters: 8/10
I was pleasantly surprised with the characters, especially with a harem series. Instead of being a flat out loser, Setsuna is a kind and frail, but introverted high school student who suffers from a heart defect and views himself as nothing but a burden on his sister (who takes care of him and all of his hospital bills) and decides to take his own life. Then you have the beautiful and boisterous Kanna and the silent but caring Rena. Combine them with the popular and haughty Arima who has a tsundere personality and you have a wonderful cast of characters.

Enjoyment: 10/10

Overall: 9/10

Ultimately it's the spectacular art and the great characters that make this series so good. Unfortunately, it suffers from several harem clinches, but if you can overlook them, you have an enjoyable romance/harem series with a lot of potential on your hands.