Ryo is Akira's best friend and has long been infatuated with Akira's mother, Sumire. Having experienced his parents' divorce at a young age, Ryo never felt a mother's warmth, and seeing Akira spend time with Sumire—always smiling and kind—filled a void in his heart. As days passed, Ryo gradually began to see Sumire as someone who should belong only to him...