Well, I've been a lil' bit sentiment lately, so I decided to read this.
All I can say is that this manga is all standart. 4 stories about a girl and a boy who meet each other and have to deal over some stupid problems (coming simply out of misunderstanding or inexpierence) just to become another happy couple. The only interesting is the 4th one, 'cause there you can see a real problem: what should you choose - your career or your beloved boyfriend?
Art might be decent. I like Usami-san's style, but seems like she didn't work really hard on some pages, so they came out to be... somewhat dreadful, I'd say.
Characters are more than mediocre. All of them are the same: a stupid and naive, but kind-hearted and gentle girl and a cool and serious guy (I still can't understand how the people of these types may be together). We saw it lots of times both in manga and anime.
However... Yes, despite all that, I still enjoyed it. But only because I was in that sentiment kind of mood.
Anyway, you can pick it up if you like lovey-dovey stories with happy ends. Or if you're in love with someone right now. If you're sick and tired of all these soap operas, love affairs and standart characters - go and choose something more decent.