[Crossover + Touken Ranbu] The Promise

Before the age of three, Randy Estoraneo was a happy child. His parents loved each other, his older brother was gentle, and everyone in the family doted on Randy, the youngest. Randy grew up like any ordinary child. By all normal expectations, his life should have followed a perfectly ordinary path, but things weren't that simple, because Randy's family was an Italian mafia family. For a research-oriented family with madness flowing through their blood from birth, going mad was all too easy. Then Randy discovered that his brother had disappeared, and later, he himself "disappeared." Little Randy was buried at the age of five, crushed beneath the darkness of his trauma. The few warm memories he had were shattered by the cycle of rebirth, and naturally, forgotten. Thus, Rokudo Mukuro was reborn amid towering flames. He made revenge the meaning of his life and used his seething resentment as its fuel, sinking ever deeper into darkness and becoming increasingly unable to escape the mire of self-destruction. Fortunately, someone eventually brought him back, keeping the once shy, gentle-smiling child from losing his way in the darkness. To Honmaru 009, their Saniwa was a terrifying being, someone they both feared and loathed, yet had no way to escape. Little Randy, who had stumbled into their lives by accident, was the only light left in their hearts. But even that tiny glimmer was about to be taken away. All that remained in their eyes was the fading light in little Randy's eyes the last time they saw him, and the glaring red on his body... They hated. They resented. But unable to reach Randy again, there was nothing they could do. They lived just like their counterparts in other normal Honmaru, and the whole place seemed perfectly ordinary. Only the bones buried deep in the back mountain told of their bone-deep hatred. Beneath that cherry tree, they guarded the promise that had been forgotten, waiting... Before you start reading: 1. Written for love. Updates are not guaranteed. 2. The story is being revised, so fake updates may appear from time to time. 3. Lots of personal headcanon. Logic has gone to the dogs.