Junko Fujisaki is a 43-year-old woman with long, wavy brown hair parted down the middle and green eyes. She stands 167 cm tall with a figure measuring 94-61-90 cm and a G-cup bust. Her wardrobe consists of housewife-oriented clothing like aprons, skirts, blouses, and tank tops, typically accessorized with earrings and a wedding ring. She is also shown in intimate apparel such as lace lingerie, nightgowns, pantyhose, and leggings. Junko is the widow of her first husband and mother to their son, Ryouichi. After roughly a decade as a single parent, she remarried Tooru Fujisaki, becoming stepmother to his daughter, Miki, creating a blended family. Junko outwardly embodies a kind, nurturing, and devoted housewife, deeply committed to her roles as wife and mother. Privately, however, she struggles with intense, unrestrained sexual impulses. These urges drove her to infidelity and, critically, to initiate non-consensual sexual contact with her sleeping son Ryouichi before her remarriage, a pivotal moment in their relationship. This encounter ignited an obsessive desire for his mother in Ryouichi. Two years after Junko's remarriage, witnessing her intimacy with his stepfather reignited his fixation. He subsequently planned assaults during her daily jogs, approaching her as a masked figure. While Junko outwardly resisted these attacks, she internally experienced gratification as they fulfilled her unmet sexual needs. This complex dynamic transformed her maternal relationship with Ryouichi, intertwining it with secrecy and illicit desire. Her character arc centers on this duality: the caring family figure contrasted by a profound inability to control her compulsions, which ultimately redefines her familial bonds.