The Reformation of the World as Overseen by a Realist Demon King Vol 9 manga

Description:

Having already bested four demon kings, Astaroth, Eve, and Jeanne embark on a new quest with Ryoma, the half-elf girl who begged them to help find her father. But when they arrive in the port city of Bernese, they find it embroiled in a scandal over...a ghost ship?!