This is a classic example of a cliche shoujo romance.
It's very formulaic, the formula applied is:
A shy,insecure, big hearted heroine, a rude, playboy hero and their love story.

It's so very generic.
The hero doesn't have the depth that other's like Daisy and Usui have.
The heroine doesn't have the balls and personality like Misaki or Kyouko.

The anime centres on the character's relationship and has little variety.
There's a lot of kissing and frisky stuff going on.
It's labelled as a coming of age novel but mostly every action is based on the romance.

Then there's the fact that when the characters are, ahem, 'love making' Hibino, the heroine makes such tortured expressions that it is painful to read. I felt embarrassed for her and quite sorry for Kyouta, her boyfriend who has to deal with that kind of negativity in bed.
But well, since he's pretty brainless himself, he probably likes it.

Hibino was actually a source of quite a lot of anger for me. She is just so damn insecure and meek. I hate the fact that girls are portrayed like that.
Sure, there's a thing called giving into your man, when you feel like it but not standing up for yourself AT ALL.
That's just bullshit.
Secondly, she is just so stupid.
I can't even think to sugarcoat it.
She acts stupidly and selfishly and then usually does something to label herself as a selfless martyr.
Nope. Not buying it.

Kyouta's biggest good trait is that he's pretty.
That's also his only good trait.
He doesn't have much of a character and the fact that he makes his own team lose so that his girlfriend's can win is just plain lame.
Call me old-fashioned but I really hate these stupid attempts at romance.
Cheating for your girlfriend is not romantic.
It just proves you both to be wimps.

So basically, it comes down to the fact that this manga lacks any sort of plot or character development.
What it does entail is two mindless characters making out mindlessly.
So if you want a guilty pleasure to burn time, this manga is for you.
If you want to read something substantial or meaningful, run far and fast.