This series is about a girl with surprisingly perverse thoughts/misunderstandings, and her boyfriend who serves as the straight man to her actions (and those of the other female cast).
On its own merits the story works okay as a series of vignettes over each episode, though they are often unconnected and so feel disjointed. Each character is based around one particular trait and none exhibit any particular growth throughout the series. None of these are particularly unique, with the prudish student council president, the brocon sibling, and the airhead all carrying a lot of weight over the series. Slightly more unique is the girl who gets turned on by watching everyone else.
The humour largely derives from one character expressing that trait, and the straight man either reacting to it or having that trait bounce off Kosaka and her own thoughts. In short bursts this works okay but it is hard to sustain over a full episode, let alone 10 episodes. Because each character has only one aspect and little to no growth, the humour gets stale.
It is decent to watch for a short time, but there are superior series out there that can serve you much better on almost every aspect. If you want a comedy about a perverted girl and her boyfriend, B Gata H Kei does a much better job with a character-driven story still filled with perverse humour. If it is the rapid-fire humour of each vignette that appeals to you, Seitokai Yakuindomo does a much better job not only in the variety and pacing of humour, but in using the traits that define each person for that too. In comparison to these Shobitch is not good, just okay at best.