I'll Be Waiting for You at the End of Time

After losing her memory, she only remembered one thing - to pick up someone at the subway station every evening. Her family told her that no one would come, but she didn't believe it and waited rain or shine. Three years later, a white-haired old man appeared at the subway station with a cane. She went up to him and said, "You are finally back." The old man cried: "I can see you waiting for me on the surveillance camera every day, but I had a stroke and couldn't walk. Today I crawl here to tell you - don't wait." She smiled and said, "Then I'll wait for you instead." The next day, she appeared at the door of his house with a cane. Time will take away memories, but not the affectionate instinct.