I Became the Source of All Evil

[Updates are sporadic for now. I'll do a major rewrite when I have time.] As a purebred vampire with his own theme music and an imposing aura, Ciel woke from a sleep that had not felt long to him, roused by some unknown turmoil. Still not fully awake, he learned that the reason he had awakened was that the world had fallen into chaos. Mori Ogai, the mafia boss he had once supported, had been missing for days, and the contract he had made with him was on the verge of becoming void. Chuuya Nakahara, whom he had carefully raised, had not become an executive as planned. Instead, he had joined the detective agency and vowed to kill Osamu Dazai. Cursed spirits were running amok, sorcerers had stopped exorcising them, and the world was in chaos. Yokohama had become a city cut off from the rest of the world, shrouded in dense fog and pitch darkness. For many, simply staying alive had become a luxury... And it was all because of what he had done after... Ciel, piecing together clues about what had happened while he slept, calmly lay back down. The root of all evil was me! And the most disastrous part of all... Was the current head of the Port Mafia, whose neck was wrapped in a scarf as red as blood. The boy with the amber eyes whom he had once personally led into the light now had a cold, empty gaze. Ciel: It's not a big deal. There's still time to save this. Ciel: They're just a few problem children... Wait, wait! What are you all doing here?! Looking at his old friends, best friends, contract-bound companions, and followers, each more thoroughly corrupted than the last, Ciel wore a world-weary expression. Maybe this world should just be destroyed. The leader of the problem children, a certain boss shrouded in black mist: Sir, are you giving up on me again? OOC warning. The timeline has been heavily altered. The male lead is overpowered and ridiculously charming. There are unrequited feelings and a love rivalry. The CP is Dazai. Theme: Time passes, but stories live forever.