"Not very communicative?" Tsuna's face takes on an almost exasperated look, mixed with a good deal of his usual derp insecurity, "H-he's doing that thing again isn't he? Where he pushes himself too hard?"

And he starts heading toward the library, obviously this had been some sort of concern... and not the first time he's pulled a stunt like this. Tsuna himself appeared to be both worried and a bit tired of Gokudera's antics. Lord knows what he's gone and done this time...

And squatting in front of the library peeking into the keyhole is Yamamoto, looking cheerful as ever, in his full kendo garb, clearly having just finished as well.