Dog is a pure optimist who holds out hope that today might be the day Sensei shares her snacks with him...

After a rough day at work, Sensei is cheered up when Dog shoves a ball in her face. Even Cat shows concern for her in his own way.

While taking Cat to the vet via taxi, Sensei listens as the driver tells her about the cat he used to have.

Sensei recalls what Dog and Cat were like when they were little.

Dog once managed to spill the container his food is kept in, and he still tries to knock it over every day, optimistically hoping it will spill again. Cat, on the other hand, doesn't wait around for happy accidents.

Dog gets so excited by all the attention he gets at the vet's office, he doesn't even realize he's been given a shot. Cat, however, is less excitable...

A conversation with her editor reminds Sensei of the dog she had before taking in her current dog and cat.

Sensei tries out some new grooming brushes for Dog and Cat.

Sensei recalls an odd childhood habit she picked up when dining out with her family: she would secretly take the bones from her lamb roast home to give to the family dog.

Dogs are notoriously light sleepers, which means you have to be careful about the noises you make...

Sensei's mother reads the first volume of the Dog and Cat manga, and it prompts her to reflect on how much Dog and Cat have aged since it was written.