Fushiko

Suffers from an unspecified illness which forces her to live in confinement devoid of human interaction. Her constant state of solitude is further exacerbated by the regulations of her apartment which do not allow for any pets to be present on the property.

To overcome the growing sense of loneliness that such a lifestyle entails, she engages in a VR Game called "Dog Livelihood VR" allowing her to interact with dogs as if they were pets and present in reality. After numerous days of playing extensively, she effectively completes the game as her dog's affection parameters are all maxed out and all supplemental packages have been purchased. In a frantic search for any modicum of additional content, she accidentally discovers that the game has a hidden adult (18+) mode.

With the realization that she'll never experience a normal sexual encounter due to her condition, she provides her consent to deploy the mode which ultimately leads to her exploring and indulging in various acts of bestiality through an experimental software kit and her VR representation, Yoriko.

Spoiler

As the master-servant relationship with owner and pet is eroded through her actions as Yoriko, she finds herself overwhelmed by lust and unable to escape the pleasures of animal love culminating in her abandoning the boundary between both identities and embracing bestiality and, in turn, sexual slavery in real life.