Settling Conflict Between Skies

When their world is broken and they are all dead, they are reincarnated in a parallel world where only a certain hitman has his memories. With no idea on how to get the others memories back he sets out to do everything that happened in his world.

Twin skies was very rare in the Mafia so when the dead Vongola Decimo is reincarnated and born with a twin things start to turn ugly.

In another universe Sawada Ieyasu has just died but is now reincarnated into the younger out of the two. With memories of his past life he sets out to turn Vongola back to what it once was, a vigilante group.

KHR doesn't belong to me so credits goes to Akira Amano.