All I know since yesterday is everything has changed

Harry Potter - J. K. Rowling
F/F
M/M
Multi
G
All I know since yesterday is everything has changed
Characters
Regulus Black/James Potter, Regulus Black, Harry Potter, Sirius Black/Remus Lupin, James Potter, Mary Macdonald/Lily Evans Potter, Kreacher (Harry Potter), James Potter & Lily Evans Potter, Kreacher & Harry Potter
Tags
Eventual Happy Ending Time Travel First Wizarding War with Voldemort (Harry Potter) French Regulus Black Latino James Potter Title from a Taylor Swift Song James Potter and Lily Evans Potter Raise Harry Potter Second Wizarding War with Voldemort (Harry Potter)
Summary
After discovering the identity of R.A.B. Kreacher gives it to Harry a lost letter from Regulus to Sirius and he decides to go back in time to deliver it.But upon returning to the wrong year, he discovers a secret that could change the entire reality in which he lives.English is not my first language, so forgive me for any mistakes <3
Note
I wanted to write a story where Harry was with his family during the Second Wizarding War and had his parents' help when facing Voldemort.So, I decided to involve a time turner and that's what happened...Hope you like it!

Chapters