"You must not get involved with Sayuri."

I overheard a young man and woman having an ominous conversation on their way home from work. From what I could gather from their discussion, a woman named Sayuri was apparently a dangerous woman, and there was talk that a man named Kent was in danger. At the time, I thought it was like something out of a drama, and that was all. Because I never expected that I would come to know what happened next...