Happy version:
The teacher asked: What does it mean to "break one's word and gain weight"?
A student: Maybe it means you will get fat if you break your promise? ! This is really terrible! ┌(.Д.)┐
Teacher:…………
Literary version:
Shi Yan looked at himself in the mirror and couldn't help but smile bitterly. Sure enough, you can't break your promise, you will really get retribution.
Cheng Hui looked at her from a distance and whispered four words.