Butler realized towards the end she was probably talking about a love interest, so it's entirely possible his last reply was as wellI wish. I hope. I doubt.
In the flow of things, his first thought was rivalry, and Yayoi has no idea she's having a romantic discussion. So I think the implication is the butler continued talking about being lifelong rivals with gramps rather than subtly hinted at romance.
You'd make a good Japanese romcom character.Butler realized towards the end she was probably talking about a love interest, so it's entirely possible his last reply was as well
Butler gay