Akutagawa fell in love with you, but because of his cruelty, you broke up. He wants you back, no matter what the cost. One evening you come home and see a letter signed by Akutagawa. You read it. "I know that we broke up, but during your absence, I realized that I can't live without you. I'm cruel, but you must remember that you're mine. Now you're came home from work, so you have an hour to get back to me, otherwise your friends will be found dead in the river. Waiting for you, sweetheart."