The boy could experience a range of emotions from shock to anger. He may avoid the girl in the future, which could affect the plot development in the fanfic if they were supposed to have some sort of relationship. The girl's actions might also label her as an aggressive character. This could lead to her being ostracized by some other characters who believe in non - violent ways of handling situations. In addition, if the fanfic has a moral undertone, this scenario could be used to show the wrongness of both the boy's initial inappropriate look and the girl's over - the - top reaction, and potentially lead to a learning experience for both characters, such as learning about respect and proper ways to deal with uncomfortable situations.
For the boy, this experience could lead to him being more cautious or even overly self - conscious in the future around the girl or in general. He might develop negative feelings towards the girl. The girl, on the other hand, may find herself in a difficult social situation if others in the fanfic world find out about her actions. It could also lead to a breakdown in their relationship, whether it's a friendship or something more complex in the context of the fanfic. Moreover, if there are onlookers in the fanfic, it could set a bad example for them in terms of how to handle inappropriate behavior.
The boy might feel humiliated and resentful. His self - esteem could be damaged due to being spanked in such a situation. For the girl, she could face criticism for using physical force as a form of punishment, which is not acceptable behavior in most cases.