Like the story so far but...
Well it reads more like a totally new story than a sequel to your "Summer 4th year" story...
Most notably due to 1 major change and 1 minor but not insignificant one...
Minor: Ginny's fight with Hermione over Harry... it seemed at the end of "Summer 4th Year" that Ginny was going to change focus
MAJOR: Sleeping arrangments... So they are no longer sleeping together, no big deal, they couldnt at school anyway... but Hermione's parents and even to some extent Sirius's "forbidding" it after allowing it in "summer 4th year" is a total reversal...