WELCOME TO ANOTHER ONE OF MY BIASED REVIEWS. FILLED WITH SPOILERS.

Let's just say that this is going to be an angry one. Starting off with the ratings...
Story - 8
Art - 7
Character - 6
Enjoyment - 6
Overall - 7

Summary of my thoughts on this manga...
Good point(s) - Sexy, REAL sexy scenes + Interesting plot
Bad point(s) - I feel that this is more of a personal thing, I just can't seem to sympathise with the characters. I feel empty. I don't feel any emotions(apart from natural hormonal reactions caused by the sexy scenes) throughout reading the manga. I'll go more into this later.

Story -
I don't have much to say about it, interesting plot twist, nice guys turning dark and evil over desires are always something that amuses me(except in Sasuke's case. But then I've hated him from the very beginning so that's a different story.)

The reason why I can't seem to feel for the characters is probably cause the amount of sexy scenes overpowers everything else so much that I can't seem to take the "everything else" seriously. Exaggerated example, 15pages is spent on the sexy scene while 2 pages are suppose to be the "emotional" part. What do you expect me to feel, man.

(SPOILER)Like when Mio found out that they were siblings, she started crying and whining and all and I'm like, "AHAHAHAHAHAHAHA siblings..... AHAHAHAHAHAHAHA" cause by that point I'm already feeling pretty annoyed. Then Jinnai just made it worse, when he heard about it, he just started taking off his glasses and... Sexy scene starts. WHAT THE? Shouldn't this be an emotional moment??? Why???(SPOILER)

And I add that sexy scenes can start anytime, anywhere, anyhow, when the author feels like it, she'll put one in.

The one part I did really like about the story was when Hinata "paid back" what Jinnai did previously, using the authority he gained... Awesome

Art -
Delicious sexy scenes alert~~~ but apart from that, nothing special. That's all.

Character -
GOD. This is where it drove me half-mad. What use is having a great story if the characters fail to execute it and bring out the greatness in it? No use.

Okay then, let me ask you a few questions. What is so good about Mio? Apart from the fact that she has a godly figure of cause. 'Kay, she's a caring sister and well... Isn't it only normal that she acts that way? Sisters are suppose to be caring, all my female friends who have younger brothers are like that, they clean up after their younger brothers, tolerate their temper and stuff. It's natural. I don't have any personal experience since I only have a married older brother who's like 15 and a half years older than me.

(SPOILER)Moving on, what kind of CHILD takes off another CHILD's glasses and kisses the CHILD? Failed parenting? I'm talking logic here. If the parents I know sees their child doing such a thing, they would probably slap/spank them. Like seriously, it's improper, even teenagers doing that will get unpleasant stares from people, plus possible lectures/slaps from their parents.(SPOILER)

And bout Mio liking that Jinnai guy...

*YOU ONLY LIKE HIM CAUSE HE MAKES YOU FEEL GOOD*

When I completed the manga, I went over what I've just read in my head and I'm like... What the? That guy just kept molesting her and she fell in love not long after that saying that "the part where he touched me felt hot" whatnot blah blah blah... Seriously. She doesn't like you for your money, brother, she likes you for your body.

(SPOILER)Don't start giving me what childhood crap, she fell in love even before remembering them, the childhood stuff was just an interesting plot point ruined by horrible characters.(SPOILER)

Reinforcing something I read from the mangafox forum: When was the last time Mio called him by his given name? I almost thought his name is "Jinnai" til I went to check. SHOEI, FREAKIN' SHOEI, IT'S A GREAT NAME, JUST CALL HIM BY THAT, DON'T "PRINCE! PRINCE! PRINCE!" ME!

Now for some extra perverted stuff. Her breasts. POOR PEOPLE DO NOT HAVE BIG BREASTS, POOR PEOPLE SUFFER FROM LACK OF NUTRITION AND THUS ARE USUALLY REALLY THIN, BREASTS ARE MADE UP OF *FATS* WHICH IS A KIND OF NUTRITION. MIO, UNLESS YOU ARE FREAKIN' *PREGNANT* WHICH YOU OBVIOUSLY AREN'T, YOU HAVE NO REASON TO HAVE SUCH BIG BREASTS.

Enjoyment -
It's smut, ecchi, or even HENTAI whatever you put it, which female creature won't enjoy smut? The part I enjoyed the most?

(SPOILER)When Jinnai mistook Hina for Mio and started making love to him idiotically. SUCKER!(SPOILER)

But even with the sexy scenes as distraction, I can't seem to get the unhappiness with the characters and story out of my head so I was obviously bothered and can't enjoy them much.

Overall -
Read for the SEXY SCENES~~~

cheers.
*readies fire extinguisher*