Cupid drank too much last night and mistook Xie Shixin's marriage for being unmarried. He shot Zhongyu Qing'er and Xie Shixin down with an arrow. When they woke up the next day, they found that they didn't have much regret, because anyway, the arrows they hit would be pulled out after consideration by human reality. Not to mention this, at least it made them feel their hearts beat.
Cupid's job during the day was to clean and recycle the arrows that people pulled out. Seven years later, the arrows that hit Qing'er and Shi's hearts were still not recovered. When he thought about it, he became curious. He turned on the time machine and watched them silently. He became more and more involved and shed tears.