Perhaps in a fantasy world, the girl has a special power that she can't fully control yet. When she gets angry or excited, this power is unleashed and shrinks the man. The story could be about her journey to learn to control her power and also to help the shrunken man. She may have to take him on adventures in the miniature world he now inhabits, facing tiny monsters and other obstacles while trying to find a way to make him big again.
The 'girl shrinks story' might be about a scientific experiment gone wrong. The girl is in a laboratory, and an experiment causes her to shrink. She then has to find a way to reverse the process while navigating the dangerous world of the lab at a minuscule size. There could be all sorts of obstacles like spilled chemicals that are now like giant puddles for her, and microscopic organisms that pose a threat.
Maybe the girl accidentally drinks a magic potion that has the effect of shrinking. She then has to face a whole new world full of challenges, like trying to get back to her normal size while avoiding being stepped on by others.
The girl could be a curious scientist - young and brilliant, always eager to explore new things. The man might be her colleague, who is a bit more cautious. Their different personalities would add to the story when the shrinking incident occurs.
In this story, the girl shrinking in the bus might be due to some unknown scientific experiment gone wrong. The other girl who keeps her may be curious at first. She might start to take care of her by sharing her snacks on the bus. As time goes on, she realizes the responsibility she has and tries to figure out how to get the shrinking girl back to normal. Maybe she takes her to a scientist she knows or tries to research on her own to find a solution.
Perhaps it's a story where the elf shrinks as a punishment. He might have done something wrong like stealing a cookie from Santa's plate. So, he shrinks and has to learn a lesson. He then discovers the importance of following the rules during Christmas time by going through various adventures in his tiny state, like trying to get the attention of the other elves who are much bigger than him now.
In a more fantastical version, it could be a curse. An old enemy of the family curses the husband to shrink as a way to get revenge on the wife. The wife has to embark on a journey to find the source of the curse and break it. Along the way, she discovers things about her relationship with her husband that she hadn't noticed before because she has to be so much more attentive to his needs in his shrunken state.
It could be a story where a girl has some kind of strange experience related to her feet while on a bus, like she feels her feet shrinking perhaps due to some physical discomfort or a very strange psychological perception.
It could be an ordinary girl named Lily. She is just a normal school - going girl until the shrinking incident happens to her.
Maybe the shrinking girl is a new - comer to the city, and she was on the bus exploring the area when this strange thing happened. The girl who keeps her could be a local girl with a big heart, who often helps others and saw this as an opportunity to do a good deed.
Well, without more context, it's difficult to say exactly what this story is about. It might be a story that has some symbolic meaning where 'pussy' could potentially refer to a cat in a context where something the cat does causes a man to seem to shrink in some way, perhaps in a metaphorical sense like his confidence shrinking because of an encounter with the cat. But this is just speculation.