@HikariMirai4 There's present and past. The past her have already died and is now alive again for some reason. The current (Y/n) doesn't remember anything all, not even her old friends and such. She knows that if she dies she get another chance to redo stuff that get her killed.
The story is heavily based on otome game mechanic such as days, achievement, secret route, hints and this was hint by the phone number she gotten as a hint (In case it wasn't obvious). (Y/n) goal is to survive until the end of the year so she can transfer out of the producer course to normal one and find out why is everything is happening to her.
Some characters also have power y'know like a game and they are obligated to help her reason why is spoiler so.
Right now she's just trying to find out who's giving her all the hints she been getting and trying to not die again.
Not sure what you meant by storyline but that the plot summarize up to now without spoiling anything in the future.