It's exam time once again for Kotoko, which naturally means press-ganging the smarter than can ever possibly be healthy Naoki into helping her. The trouble is, the rest of her class have had the exact same idea, and before either of them know it he's been turned into some kind of full-blown teacher for after school study sessions.
Thankfully, this episode and the storyline it follows allows us to see that much-needed human side of Naoki - Once again, you can almost understand why Kotoko has a crush on him, with the crushing one-liners and general nastiness which has been part of his character way too much so far in the series kept to a minimum.
Aside from that development, there isn't a huge amount to say about episode five of Itazura no Kiss, as it continues to plod along in a reasonably likeable fashion thanks mainly to Kotoko's turn as a strong lead character, although in fairness some of Naoki's comebacks and aforementioned one-liners are worth the price of admission too, nasty piece of work though he may be.
Itazura no Kiss is certainly an unspectacular series in pretty much every way, but somehow it's managed to keep my interested reasonably piqued throughout, which leaves it a place as passable entertainment.