Hmm- not bad, but not sure what to think of it yet- it kinda seems like its going to have love polygons- triangles at the least, and thats not my thing. But it was quite different and look forward to seeing more and hopefully proven wrong.
As for schoolgirls being being well-worn ground, i feel just about every setting has been done thousands of times, in ALL media- personally i like the school settings but still- as razzl says- whether its good or not is down to its quality not its originality in my opinion- though a unique take on a theme can add interest.
Also- its middle school setting- i feel the younger school settings arnt done nearly as much as high school. middle schoolers really should behave different and have different concerns etc if its well written.
I wish there were more elementary school set manga too- and i dont mean loli- like ichigo marshmellow - they can be really funny and cute.