 If you liked
Harumatsu Bokura
|
 ...then you might like
Amakunai Karera no Nichijou wa.
|
Both mangas are reverse harem shoujos, with a female protagonist that wants to become friends with a group of boys. Both characters are hard-working and also have female friends.
I'd say Harumatsu is slightly happier in tone and the characters have had easier lives, but nevertheless, the theme of youth and making the most of your high-school life is predominant.
Friendship is the most important thing in both mangas, too.