[God, this poor kid. Hijikata is suddenly even more grateful that Gokudera is so protective and devoted to him (and also the other Vongola Guardians, presumably) - if he were left to fare on his own he probably wouldn't even have survived until this point as such a magnet for misfortune.]

It's okay. Sometimes there just is no explanation.

[He knows how that goes. He'd also be hard-pressed to explain things like that one time Amanto turned him and some other people into screwdrivers.]

We need to make sure he stays dry from here on, but how? I can dream up a floating umbrella that accompanies him everywhere or something, but if he accidentally walks into a puddle shit will hit the fan again.

[Technically they probably don't need to care about what happens on the Island of Dreams after they leave, but he's a policeman!! He can't simply ignore the threat they'll be exposing this strange, cluttered place to!]

Or do you want to take him with you? Wait, no, that's not possible, they said.

[Unless Tsuna can accept the turtle dying as soon as it leaves the island... but somehow Hijikata doubts that.]