Originally, Gaara thought the plan - brought to him by a desperate and shaken Naruto on the last holding place of the world's few remaining shinobi - was both insane and impossible. No one ever accused Gaara of being sane, nor sensible, so he agreed anyway. He hadn't really expected it to work.

Tsuna and his guardians died in a blaze of glory. Then they woke up, slowly, one at a time, in a different world that was the same in all the ways that really mattered. Or the one where Tsuna and his guardians are reincarnated into the class below the Konoha rookie nine.