She, in order to live with him again. He did not hesitate to endure the severe pain of traveling through time and space; he had been having nightmares since he was a child, and every time he woke up from the dream, his face would be filled with tears. Until she appeared; she, for a promise, was willing to bear all the mistakes for his girlfriend; he knew everything but said nothing; she used her last time to get his girlfriend back; he regretted it endlessly, but was already powerless...