[Keiichi knows nothing of what's going on with Shiki, but hearing that doesn't sit well with him. For many reasons. So the smile drops to a serious expression and he's pushing the basket he was holding into Haruhi's arms.]

We thought of giving you a surprise, but it seems that we're the ones who aren't good enough for you. Whatever go and take Shiki to the picnic if she's having problems. And to anything else you can think of, because whatever is giving her trouble will probably still be there tonight and nights are the hardest time of the day to be alone. Even if you seem to think that it's okay to leave her alone then and not now.

[He can't tell why he's more annoyed, over their mood being ruined or over the idea of Shiki being left alone to deal with whatever she was suffering during the night. He knows that the nights are the worst, during the day there are many people around, many ways to distract oneself, during the night he only had Haruki and he assumes Shiki's in the same situation. Anyway he has no plans to stay so he turns to leave it's clear that today isn't a good day to do anything special.]

Have fun.