[Tsuna will take that as a small victory, all in good fun of course!
Cage..? He doesn't like the sound of that; it makes him think of how Mukuro is trapped in the Vendicare Prison. He wonders what this cage is, but since it seems like it will be a darker thing, he doesn't question it. The happy atmosphere is too good to mess up right now]
O-Oh, really? [Blushing! Heat coming up from his neck to his cheeks, a mirthful laugh escaping his lips] So I was picked over someone you liked before..? [Wow, isn't that new! His tone must be obviously surprised]