Hidamari Sketch, Gakuen Utopia Manabi Straight! Recommendations
If I can say that Manabi Straight was about the beginnings and growth of friendships and what happens before, during and after the process of moving on, then Hidamari Sketch is about the fun times being had when those friendships are already in the growing stage and the future is nothing more than a passing glance. Both have great casts of characters that work together and have fun. Hidamari Sketch is more laid back than Manabi Straight, and the former is a series of standalone episodes compared to Manabi's driven plot, so keep that in mind.
A gourp of high school girls do things.