[... ... ... That's an interesting question. Yu gives him an appraising look. Tsuna seems so unassuming, but...what, does he have enough secrets that he can categorize them?]

The secret kind. [--is a dumb answer, come to think of it, so he tries to get more specific.] I guess...we can either start with something small and go bigger if it doesn't work, or just go with one big one and figure it should take care of any requirement.