Oh No! Their Son's a Billionaire! EP 1

On their anniversary cruise to Nagasaki, a wealthy couple is mistaken for ordinary tourists and ruthlessly mocked by their guide. But when their true identity is revealed, payback hits harder than anyone imagined...

EP 1: A wealthy couple embarks on an anniversary cruise to Nagasaki, reminiscing about their past, but their son Hayato worries about his father's health. Meanwhile, a tour guide eager for a promotion is assigned to them, only to mistakenly mock them for being ordinary tourists.What will happen when the tour guide realizes the true identity of the wealthy couple?