[Finally read all: Now updated.]
Chapters seen:31/31
[Genre ratings]
Yaoi:2?
Man... one of the 2 guys "in love" has 90% resemblance to a female?
Ecchi:6
Mainly "panties"... what else can I say?
Harem:7
Well, mostly it is about 2 girls who fall in love with a guy who has little attributes, flirtatious, horrible etc. mainly because of reasons the guy did not deserve (aka misunderstandings the guy did not clear but instead let them continue)

For a first, this is the first review I've doen that I will separate into 2 parts, 1-18 and 19-27. Reason being, these 2 portions seem to be totally different.

[1-18]
Story:8
Amazing storyline, I was so surprised at the twists to the story, although there were some irrelevant parts. 1 great point was the teacher staying with the main character... but it was strange that the teacher did not discover anything amiss.

Art:8
A lot of effort in drawing the stuff, even with many characters, and it was clear.

Character:7
Some were a bit blur... their personalities. The main male character was not expressed very well, although the main female characters were better expressed. Side characters played their roles well too.

Enjoyment:9
The plot was exciting, some jokes were made and it is quite an enjoyable gender-bender series compared to some others (especially with harem). Originality made this a whole lot enjoyable.

Overall:8

[19-27]
Story:3
2 words: Harem. Fillers.
The main male character became very horny and went out with the 2 main female characters at the same time, more female characters came into the picture and arouse him. Chapter 27 was a detective story (a lot of mangas have that==), which ended with what they sort of started (thus no plot).

Art:8
Same art.

Character:4
Some had a personality change i believe, and the main male character became downright horrible... dating both a male and a female lols. Not much character development.

Enjoyment:3
The word "panties" came out much more in 19-27. Yeah... and it was too much a harem story without a plot that I am kind of thinking to put a hold on this series, I thought the plot would deepen from chapter 18 D: .

Overall:2

[28-31]
28 is like the start of an ending arc. It seems to flow back to the original story, starting with some school probs then to some personal probs. But seriously, it was too rushed and too easily resolved, not much value added at the end. But it was concluded, definitely. Not exactly good, but still an acceptable one.

[As a whole]
Maybe read 1- 20 then skip to 28 or something?:D
Overall:5