Work copy:
Tang Dong has always had a crush on a sister since he was a child, but it didn't last long. That sister moved to City A because of schooling, and I haven't seen her since.
But when Tangdong was in college, she met that sister again, and she used the excuse of tutoring at night to be alone with the teacher every day.
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When Qingzhiyue was a child, she had a very annoying sister who followed her around every day. Later, she moved to City A because of her schooling. She has never seen her since, but she was a little uncomfortable with it at first, and slowly she started to get used to it.
When she grew up, she worked as a teacher in a university. On the way to work, she met her annoying sister again.
But after getting along with each other in the future, she was not bored with that annoying sister, but had another emotion.
Intention: Study hard, even though it's useless