Well, in the 'boarding school juliet light novel', it might revolve around the daily lives of students in a boarding school. Juliet could be a key figure in some sort of love story or drama. There could also be themes like friendship, competition among students, and the unique rules and cultures within the boarding school environment.
Conflict is also a big theme. This can be conflict between Juliet and other students, or internal conflict as she tries to adapt to the new rules and social structure of the boarding school. For example, in some fics, she has to deal with strict teachers or mean classmates.
Since Juliet is in the title, she is most likely one of the main characters. There may also be other students in the boarding school who play important roles, perhaps her friends, rivals, or love interests.
There's a 'boarding school juliet fanfic' called 'The Secret of Boarding School Juliet'. In this fic, Juliet discovers a hidden mystery within the school walls, which makes for an exciting read as she tries to uncover the truth while dealing with her normal school life.
I'm not specifically familiar with this 'boarding school murders lifetime true story'. It could be a very specific local or less - known case. Maybe it involves students or staff being murdered within the boarding school environment. Without more information, it's hard to give exact details.
I don't think they are common. Boarding schools usually have a code of conduct that promotes respect and good behavior among students. Teachers and staff are also vigilant to prevent any form of harassment. So, while you may hear a few wedgie stories from time to time, it's not something that happens frequently in the boarding school environment.