[Well, Yosuke had been continuing his quest to try and figure out Marina. Until he got to the library area... and not just because of his allergy to recreational reading that isn't paging through weekly manga anthologies on the shelves.
He's stopped pretty dead in his tracks by the sound of Saki's voice. He can practically feel the color draining from his face. Part of him wants to say something - even if it's just to tell her that he'll back off and not bother her. But the other part of him wants to just play dumb and approach it later. And then there's the 'let's not talk to her at all' road, but he's pretty bad at that.
In any case, he doesn't say anything yet, looking at the other surroundings while he tries to decide what to do.]
Hahahah... [Of course, the awkward chuckle kind of gives him away, doesn't it?]