[W-What? N-No! That's not the case at all! It just so happens that he likes watching the rare expressions on Yamamoto's face; ones that don't happen so often and, in this case, he gets to see. With the both of them blushing and being embarrassed, the atmosphere isn't as awkward or tense as it would be with any other person in the room. It makes it... fun despite the weird quirks they've suddenly come down with.

Tsuna softly nods and the color in his face brightens even more when the other mentions enjoying the same look on his own face. He sheepishly laughs and rubs the back of his neck, unsure of whether or not to trust his mouth to say anything in reply that wouldn't be any more embarrassing. After a moment and some thought over it, he shifts a little closer next to Yamamoto and smiles.]

I... want to spend time with you too. J-Just us. No one will find out as long as we keep the door locked. There's nothing to worry about since it's just the two of us, remember? I stopped worrying as much since you said that.