Shizue serves as a secondary character. She is the wife of Akihiko's boss, abandoned when her husband eloped with Akane, Akihiko's wife. This betrayal sparks a severe emotional crisis, fueling intense resentment and erratic conduct. Consumed by this rage and exhibiting clear bloodlust, Shizue arrives at Akihiko's home wielding a knife. She intrudes precisely during Akihiko's intimate encounter with his mother-in-law, Sayuri, igniting a chaotic physical confrontation. Her violent entrance and seething resentment inject a volatile element into the fierce competition already unfolding between multiple women for Akihiko's attention.