A very common theme is the build - up of the physical sensation. The male character starts to feel a mild discomfort which gradually turns into a strong urge. And there is also the relief at the end when they finally get to relieve themselves, which is often described in detail to show the contrast between the previous discomfort and the present comfort.
One common theme is the sense of urgency. For example, a girl might be in a situation where she can't immediately find a restroom. Another theme is embarrassment. If she has an accident in public, it can be really humiliating for her.
One common theme is the exploration of vulnerability. In these stories, characters might face situations where they are struggling with bladder control, which reveals a side of them that is not always shown. Another theme could be about acceptance. How the characters, whether it's the one with the omorashi situation or those around them, come to terms with this unique situation.
One common theme could be the struggle of the boy character with the physical discomfort related to omorashi. Another might be the reactions of other characters around him when they notice his situation.
Another theme is perseverance. They have to endure the physical discomfort and the mental stress. In some fictions, the female characters might be in a race against time to find a suitable place, showing their will to overcome the situation.
Yes, they can be common. Boys, especially young ones, might get so caught up in play or other activities that they forget about using the bathroom until it's almost too late. This can lead to situations that can be turned into these types of stories.
There was a male athlete who was in the middle of a very intense and long training session. He was so focused on his performance that he ignored his need to go to the bathroom at first. But as time passed, the pressure in his bladder became almost unbearable. He had to quickly finish his set and dash to the nearest restroom while trying not to lose his composure.
Well, there's a story where a girl is at a big event outdoors. There are long queues for the portable toilets. She drinks a lot of water before realizing how bad the situation is. She has to hold her pee for a really long time, and the story follows her internal struggle.
One 'omorashi story' could be about a person who was on a long road trip and there were no rest stops for a very long time. They had to hold it in desperately until they finally found a place. It was a nerve - wracking experience for them.
One boys omorashi story could be about a young boy on a long car journey. He didn't want to stop the trip to use the bathroom but as time passed, he started to fidget and cross his legs. Eventually, he couldn't hold it any longer and had a small accident. But his family was very understanding and helped him clean up.
An omorashi fanfic is a type of fan - created story. It often focuses on themes related to the omorashi fetish, which involves the concept of having a full bladder or urinary urgency. However, it's important to note that such themes might be considered a bit niche and not suitable for all audiences.