Hikaru, who aspires to become a caregiver, is asked by her boyfriend to care for his father, Grandpa Yasu. Although she is reluctant, she accepts the request for the sake of her beloved boyfriend, but what awaits her there is not an elderly man who needs care, but a perverted old man who repeatedly sexually harasses her. Will Hikaru, who has no way out, continue to volunteer as a sex worker under the guise of caregiving...?