Saori (Kuraki), who has always felt inferior to her sister Ayaka (Orikasa), who is beautiful, kind, and loved by everyone since childhood. Now living apart from her sister, her life has become chaotic, and she leads a decadent life with Katsu, who she happens to be cohabiting with. One day, upon receiving the news of Ayaka's engagement, Saori is enraged by the difference in their circumstances and directs her twisted emotions towards Ayaka...
