I wouldn't call it "worse", but I do get the sense that the mangaka is flailing to find a story line with enough meat on it to last for a good long series. This is perhaps the reason why the series ended after only fourteen more chapters. It has a cute ending, constrained by the reality of this being a middle-school couple, but the artist seems to have run out of plot ideas, or at least plot ideas sufficiently interesting to raise their poll numbers in those big telephone-book sized manga 'magazines' they have in Japan, and thereby keep the series alive.