[Tsuna nods, looking her squarely in the eyes. Polygonal-y, perhaps. Squares are too precise for someone like him.]

You don't need to erase it. If we erased the past, we wouldn't be who we are today, and I like us the way we are. [Then he adds, with a nervous note in his voice:] And I really like that we're all alive. Right now.

[So let's stay that way.]