Specifically, Kagami is nit-picking about Konata saying they match, because as the last panel indicates, at first there is the ahoge difference; thus, Kagami in all her tsundere-ness, secretly tries to rectify the problem.
Ka~gami~n!It looks great on you...I see...
Tsun-tails?I did my hair up so that we match.
In Tsun-tailsA play on tsundere and twin-tails most likelyYou're free to change your hairstyle however you wish, but to say that we match...During a breakWhat's up? Embarrassed?mirrorLike there's anything for me to be embarrassed about!?Something like this...?