What a shame. I thought it would actually focus on all of the characters, but as you read on, it focuses more on the girl that I find a little bit annoying (always crying, etc.). The girl with the long hair, the nurse and the guy that play games are my favorite characters, but wasn't focused on that much.
What I find as a disappointment is that they didn't touch on the background of each characters (besides the girl with the short hair, because we already know what's up with her). Especially the girl with the long hair and her past boyfriend, the father of her baby. I was expecting maybe her ex-boyfriend would come back to create more drama, and maybe her feelings are still with him, blah, blah, blah. Or maybe the mangaka could've just dedicated a chapter on each leading characters (long-hair girl, gamer, the class president, the delinquent, the nurse) so that we can understand them more and they could've talked about their backgrounds, etc. (notice how I left out the short-hair girl). I would also love it if they touch on the long-hair girl's parent, and her career as a model back in Japan. Her and the delinquent's pasts are a mystery to me.
ALSO: the relationship between the gamer and the long-hair girl is so undeveloped to me. Even though the problems in the manga was resolved, I was just left with an unsatisfied taste in my mouth... I wanted more.