The heroine is an ordinary white-collar worker. Like most people, she gets up early and takes the subway to work from Monday to Saturday, and then takes the subway home after a mediocre day of work. If there is anything special about her, it is probably that she has a boyfriend that most people envy. Her boyfriend is not a high-income earner, and he is not particularly handsome, but he is very kind to her and helps her with everything in life. He will also buy a small gift or treat the heroine to a big meal every month when her salary is paid. They have been together for many years without missing a day. She didn't know how lucky she was to fall in love with a boyfriend who was so good to her. In terms of beauty, she wasn't very pretty, nor did she have a very good personality, and her upbringing and temperament were at the level of an ordinary person. But he told her that he would always be by her side, no matter what happened, and with her boyfriend's promise, she, who had always been undecided, no longer considered anything. She believed his promise, and he fulfilled his promise with actions.