Ecchi with a good plot. A "decent ecchi" perhaps.
This is my first review, so please bear with it.
I originally thought that this anime was all about sex, physical contact, etc. But I was surprised that it was more than that. I admit that it was because of the fan service I started watching this series.
Story: 8/10
The series has a very good plot. Their were scenes that made me happy, sad, surprised, and some even got me in the mood. There's something about everything in this anime - Romance, Comedy, Harem, Love Triangle, and Drama.
Art: 8/10
The art was good also. The characters are drawn the way an ecchi-anime-lover likes. I really liked Ako's hairstyle, Mikuni's eyes, and Riko's band-aid on her cheek. Because this is an ecchi anime, you'll expect that the female characters are very feminine.
Sound: 9/10
I would give the sound a score of 9, since the background music really suites the atmosphere/emotions during specific scenes. There are emotional scenes, and the producers did a great job in providing the soundtrack.
Character: 7/10
The characters were pretty unique, especially the teacher. To be more specific, you will somehow find a type of paraphilia in every character. Lolicon, mammagynophilia, exhibitionism, cosplay and eroge, and even urolagnia (in a funny way).
Enjoyment: 9/10
I really enjoyed watching this anime. I got hooked after watching the first episode. It was very amusing, and it really got me. There were also emotional times, especially in episode 11.
Overall: 8/10
It was a really good watch. It has reached my "must watch" list. Other reviews (from other forums) say that it was typical, boring, and a waste of time, but I disagree. It blew my expectations away. Although it haven't reached "Makoto Shinkai-level" for greatness, it reached mine.
I would really recommend this, especially to ecchi lovers, and to those who ran out of titles to watch.
I myself, like ecchi, but no so much. I prefer mature/serious romance.