Calligraphy schoolbag pendant

It's okay. You didn't mean it, and you didn't sabotage it. It was a complete accident. It's normal for the teacher to ask you to clean up, and when school is over, the teacher asks you to go, which proves that he doesn't blame you too much. If you feel unclean, you can clean it carefully the next day! Don't worry, it's just an episode, not a mistake.