Why does hell have a salty scent??

When the Vongola Decimo died in a battle against an enemy famiglia, he didn't expect to wake up finding himself on a small boat floating on the open sea with a cow-looking giant fish staring down at him in hunger. "Well, karma is always a bitch" he grumbled.

A KHR x OP crossover
OOC!Tsuna
Cover is mine
I don't own OP and KHR
Enjoy!