I Was With You When You Wrote That Line (it was me that you had on your mind)

Harry Potter - J. K. Rowling
F/F
F/M
M/M
G
I Was With You When You Wrote That Line (it was me that you had on your mind)
Summary
Regulus leaves his band to join his brothers band who just kicked out one of their members. The Marauders have now become one of the biggest bands of the decade, but what happens when Regulus' old band also rises to those ranks?
Note
Disclaimer: I do not support JKR. This is literally the farthest thing from cannon compliant. And I'm not the best at writing I just randomly thought about this story listening to Him by Harry Styles (hence the title) and felt like attempting to writing it.

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