Music Keeps Us Sane KHR fic

Tsuna was the younger twin of Hikaru, and yet when they were little, Hikaru would look up to Tsuna as if he was his older brother. One thing they were constantly caught doing was listening to music together. Their bond was unbreakable, or so it seemed. One day, the twins found their mother after she had destroyed the phone and gotten drunk, then things spiraled out of hand from there. Why did Hikaru start abusing Tsuna? With Hikaru's personality problems, and Tsuna's developing personality disorder, the future for the twins looked grim. But will it all change when a fedora wearing hitman enters the scene saying that Hikaru would be a mafia boss?

This khr fic is sorta all27, which means some yaoi. And also, Reborn is adult, along with the other acobaleno. This fic is pretty mature with like blood and abuse stuff.

I do not own hitman reborn. although I wish I did ;)