One day, Saori, who works as a live-in caregiver for the Narimiya family, is summoned by the bisexual daughter-in-law Iroha, who is also the Narimiya family's wife, and is forced into a physical relationship, but she flees and leaves the scene... However, Iroha places her father-in-law, who needs care, at a facility to spend some time alone with Saori, and she makes advances on Saori...