Thirteen is too young to gain eight years of memories that might come to pass--especially when you don't even know what to do with yourself in the present. But when the future is that bloody and dark, do you have any choice but to try to change it? He remembers the absolute agony of the doctors trying to save him, which finally sent him into blissful unconsciousness— —except he doesn’t remember any of that. Tsuna’s last memory is of putting his head down on his desk and falling asleep to the sound of the teacher’s droning, thirteen years old and tired of not understanding a word, not of being twenty-two and beloved and dying.

Xanxus is eight years old and desperate to find something more than a future in the slums. When he comes across a man with broken eyes and a mastery of orange flames, he thinks he’s found it.

Tsuna doesn't know how he dies for good, only that he still has regrets when he does. When he wakes up, he's in the body of Sawada Nana, mother of a 2 year old Tsuna, and those regrets become tenfold. He's drowning in the implications, when an Arcobaleno appears on his doorstep, and the future becomes infinite possibility.

When you have access to the future, you'd be a fool not to use it when it comes to matters of great importance. And within the mafia, nothing is more important than Inheritance. Or, Lambo discovers there's a reason the Bovino shouldn't read the Epilogue first.

Hibari Kyouya travels in time and takes over the world. Basically crack.

Hibari Kyouya travels in time and takes over the world.

Some changes in a timeline create big effects. Other events barely shift. The ten year bazooka allows for a glimpse of the new future...

Tsuna’s first thought when he woke up to a white hospital room and the beeping of machines was “at least I’m not in a coffin this time.” “… What?” Oh. He’d said that out loud. Reborn would’ve shot him if he’d been there.

Tsuna is dead. Hayato decides that is Not Acceptable. And proceeds to break space time to fix it. He regrets nothing. Except for the fact that he arrives back in Italy, half a world away from his Sky. He then embarks on the epic mafia road trip from hell to find his Sky, along with three escaped lab experiments, one kidnapped mafia heir, one runaway schoolkid on a field trip to Paris, and a dog called Spot. Or the one where Hayato is incredibly Extra about everything, and no-one but Dino notices.