Do other girls take the places of the ones that graduate or will that ruin the the story? Why does Setsuna have to hide that side of her especially, to her parents? Did they want her to do something else with her life? Do the singing competitions take place locally or is it national/world wide? How many groups are there?
Do you write fan fiction for these characters or role play?
We've never seen girls take the place of those who graduate, and in some cases it'd probably ruin the story. New different groups of different girls have formed after characters have graduated, though.
Setsuna is the student council president of her school, and her parents are strict about her grades, and things like that, so she enjoys it secretly at school or in the clubroom. While the idea of her parents wanting her to do something else is kinda vague, there is another girl where that's totally the case, she wants to study music but her parents want her to study medicine.
Love Live is a national competition and nothing's quite been done worldwide in-universe, but one of the real life idol groups have performed in places like LA. A fun fact is there was an earthquake during the LA performance, so the "Aqours earthquake" has been a joke among fans.
There are four main groups we have, and three named rival groups so far.
The main groups are μ's (pronounced Muse), Aqours, the Nijigasaki High School Idol Club, and Liella. Liella's pretty new so we don't know much about them yet, their anime season hasn't even happened and they aren't in the games.
While the rival groups are A-RISE (rivals to μ's), Saint Snow (rivals to Aqours), and the School Idol Association (rivals to Nijigasaki)
yes the nijigasaki names are weird don't worry about it
I won't give a yes or no answer to that but... I may or may not have some notes...