No, it doesn't seem to be a common type of story. The term 'daddys little girl' is a familiar concept, but the addition of 'bj' makes it very unclear and not something that is typically seen in mainstream story - telling.
Well, if 'bj' stands for something like a place name (e.g. 'Blue Jay' or 'Beverly Junction'), then it might be a story about a daddy's little girl in that location. However, it's also possible that this is an abbreviation for a more complex concept or activity that we don't know about yet. Without further information, it's really hard to say exactly what the story is about.
Since the 'bj' in your title seems out of place and not clear in relation to the 'little sister swallows seed' part, I'll focus on the main part. It could be that the little sister swallowing the seed is a key event in a story about a family. Maybe it causes worry among her family members, and they have to figure out what to do, like whether to take her to a doctor or wait to see if it passes naturally.
Well, without more context, it's difficult to say precisely. But generally, in a 'daddys little girl story', we can expect to see elements of the father - daughter relationship. It could tell of the times when the father is the first hero in the daughter's eyes. Maybe it's a story that unfolds over the years, showing how the father's influence shapes the daughter's character and how she, in turn, enriches his life with her presence and love.
Since I'm not familiar with this 'Daddys Little Girl Ems Story', it could be a family - centered story about a girl named Ems and her relationship with her dad. It might involve things like her growing up experiences under her father's love and protection.
The plot could center around the daughter's perspective. Maybe she's going through some typical life stages like school, making friends, and her father is always there as a support. It could also involve some family secrets or traditions that are passed down from the father to the daughter, which play an important role in the story.
One possible theme could be love. The father - daughter relationship is often full of love. Another could be growth, as the girl Ems might grow and develop with her father's influence.
The father is surely one of the main characters. He might be a hard - working man, full of love and patience for his daughter. The daughter, of course, is another main character. She could be a curious, innocent girl. And perhaps there are neighbors or schoolmates who play important roles in the story as well, like a best friend of the daughter who helps her in some way or a kind neighbor who gives the father some useful advice.