It's one of the those manga that is just so twistedly beautiful.
Story (8) - the author loves to dabble in the insane, sensual, and gorgeous. Makes you wonder what kind of person could write such a thing. It's not your typical shoujo cause it borders shounen-ai but it's not exactly yaoi either, though it has fan service. Still, it's written very well with a lot of interesting themes with small plots revolving around a bigger plot. It can also be complex at times which is nice to see.
Art (9) - Just. Plain. Gorgeous. It's enchanting and intricate. When the author uses colour, the
art looks even better. But the characters sometimes do seem like they bend a little too much sometimes, especially their legs and bottom torso which could be a little off-putting. Nonetheless, it's well drawn and should get a medal just for looking that good.
Character (7) - a little weak compared to everything else. The main characters aren't too complex but they are interesting. They're all also very good looking haha. Shiro and Anri have a lot of charisma, and Kojiro is loveable. However, out of the three main characters, Shiro seems to be the only one that is going through significant character development. Still, they're cool and likable with Shiro and Kojiro having a lot of chemistry.
Overall, it's a great manga with exceptional plot and art. Definitely something to check out if you want to get away from mainstream shoujo.