Charlotte (2015), P.A. Works, Aniplex of America
I know you have so many prompts right now, so no rush on this. But could I request something where Frank has a dog and because said dog has pretty much adopted Karen as his second owner, Karen often times takes care of the dog when he's away/busier than usual. And it doesn't take long for someone to start putting two and two together about who the dogs main owner is.