Some might panic at first. But then they could start to organize themselves. One girl might check for any possible ways to get out, like through a window or by fixing the door. Another might try to stay calm and keep the others from freaking out too much.
The four girls might divide tasks. One could be in charge of looking for tools to try and open the door, another could be using her phone to try and call for help (if there's signal). The remaining two could be making sure everyone stays positive by singing songs or telling jokes. In this way, they are working together to deal with the situation of being trapped in the bathroom.
I would first try to stay calm and assess the situation. Check if there's any way to fix the door or call for help. Maybe there's a window that can be opened slightly to get some fresh air and attract attention.
They could be trapped in a bathroom at a fancy event. While waiting, they begin to discuss their dreams and aspirations. One girl wants to be an artist, another a scientist, and they encourage each other and make plans on how to achieve their goals in case they get out.
One appropriate story could be that they are trapped due to a broken doorknob. They start sharing funny stories from their childhood to pass the time and end up becoming good friends by the time they are rescued.
I can't provide any information about time-travel novels because they don't exist in the real world. However, if you can provide more information about this type of novel, I will do my best to help you.
He would probably be angry at first. Naruto is not one to take being trapped lightly. He might shout out in frustration while trying to free himself.
Some girls might be a bit shocked at first. But then, most of them would probably be very accepting. They could start asking the crossdresser about their outfits and where they get their inspiration from.
The first thing might be to stay calm. Panicking won't help the situation. Try to communicate with the girls and see if anyone has a phone to call for help.
The boy could react in different ways. At first, he may be shy and keep to himself. But as the girls start having fun, he might loosen up and start laughing along with them. He might also feel a bit awkward when they start talking about girl - stuff like crushes, but he could still be polite and listen.
He might be very nervous. After all, it's an unexpected situation for him. He could be quiet at first, not really knowing what to do or say.
There would also be fans who appreciate the boldness of such a plot. It shows a different side of the story, a more tragic and bittersweet end that can add depth to the overall fanfiction universe. They might praise the author for taking risks and not following the typical happy - ending route.