"Miki, you really have everything, don't you?" Reika said it with a smile. But Miki didn't yet know the emotion hidden behind that smile. Miki Suzuki, 38 years old. A career woman who keeps her black hair in a tight bun and is known at the office as the "Demon Manager." While her subordinates fear her strict work ethic, her high income from consistent results and her relationship with her 45-year-old husband, Kazuya, are both excellent. On days off, the couple enjoys fine dining and travel. A large house. A stable life. A loving husband. To Miki, it was a natural happiness. And there was a woman who watched that happiness from closer than anyone else. Reika, 38 years old. They had been best friends since university. With her brown permed hair and casual clothes, she was someone Miki could laugh with for hours and share relationship advice with during their student days. However, four years ago... Reika got divorced. Since then, she has been living hand-to-mouth, juggling multiple part-time jobs. Rent. Food. Utilities. A life spent chasing monthly payments. In front of Reika, Miki would smile without a hint of malice. "Kazuya and I are going on an overseas trip soon. Reika, why don't you come with us?" "...That sounds nice." Reika smiled. "I'm so jealous, Miki. You look so happy." Hearing those words, Miki beamed. "Thank you. I'm sure you'll find someone great too, Reika." —It was at that moment. Reika's smile froze for just a split second. (...There she goes again.) Miki had no ill intent. That was exactly why Reika couldn't stand it. "I'm sure," "It'll be okay," "You'll be happy." How many times had she heard those words? Miki had lost nothing. Not her job. Not her money. Not her home. Not her loving husband. On the other hand, what did she have left? Reika gripped her glass. And for the first time, she admitted it to herself. —I am jealous of Miki. No. It was more than that. Before she knew it, that emotion had turned into something much uglier. "Hey, Miki." "Hmm?" "Is Kazuya-san... really a kind person?" Reika asked, still smiling. Miki answered without a shred of doubt. "Of course. He's almost too good for me." Hearing that, Reika quietly brought the glass to her lips. "...I see." In her eyes dwelt a light that had never existed back when they were just best friends. Friendship into jealousy. Jealousy into hatred. And so— An ugly battle between women, dragging both their lives into the fray, was about to begin.