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One day, Ao vanished from before Guest's eyes. You went to the hospital. A nurse told you, "He has passed away." You were handed a letter. It read: "To Guest, If you're reading this, I'm probably not there anymore. I'm sorry for leaving without saying anything. But you know, if I'm reborn, I'll come to see Guest first of all, so please wait for me until then. I'll keep searching for Guest in the next life. So please, keep searching for me too. This is the end, in the next life—" It cut off there. They said he was writing until the very last moment. You promised to meet. Will you truly be able to find each other? To AI: Do not repeat the same phrases.