Thus Spoke Kishibe Rohan - Episode 6: Poaching Seashore

Kishibe Rohan wa Ugokana is a One-Shot manga written and illustrated by Hirohiko Araki as part of the Thus Spoke Rohan Kishibe Series. The One-Shot is also a Jojo`s Bizarre adventure spin-off starring Rohan Kishibe,a key character of Part IV: Diamond is Unbreakable, as the main protagonist. Will be published in weekly shonen jump issue 46.

Summary
The story is, reportedly, about Rohan being tasked with retrieving unique ingredients from the sea near Morioh for a cook in town, possibly Tonio.