"So goodbye, brother, now that I'm going, can you do me a favor?"
"Of Course. What, brother?"
"My Servants, can you be kind to them? Treat them well, do not be rude or cruel, and, if they want to get out, get a good retirement or praise for the next job? It's my last request, after all, they're the last family-like thing I have."
"Our little brother, it looks like you're going to die."
"But of course, is not that what happens to guilty killers?"
"What!?"
"As I said, I am a murderer, I plead guilty to the deaths at the House of Music, I thought adding new blood to my body would guarantee immortality, but it seems that it only brought my death closer."
"Brother! Will not even disagree!? Will not you even try to live!?"
"Why would I?" You came back. I have no need here anymore."
"Because? Do not say that!"
"I've always been the extra, the dispensable, the surrogate if anything happened to you and Daddy!" Now that you're back, apparently my work is done."
"Young master!"
Do not say anything! Ciel, I died in that sacrifice, did not you realize? When you died in front of me, I took your place and served as your substitute, I became you for the last three years! That day, I was the one who died so you could continue even if in spirit! Now that you're back, I have no reason to continue with this farce or try to live longer, I've been on loan from that day, and now my time has come."
"Mr. Phantomhive! Are you pleading guilty to the murders then !?"
"Yes, that's right, Aberline, now, how long does it take for someone guilty of murder to be executed?" I'm not interested in waiting too long until I die, you know, I'm exhausted."
"Brother!"
"Good-bye, Ciel, we may meet on the other side, but I think it's improbable, after all, I have heard that when you make a pact with the devil, your soul only disappears after being eaten." But maybe we both find ourselves in the nonexistence some time, nobody knows what can happen."
"Ciel!"
The youngest of the Phantomhive twins did not say anything, for in the next second he lost his soul to his crontacted demon for having broken the contract between the two, dying instantly, with the last thing he heard having been the cry of agony and suffering from his older brother, relatives and servants. While Sebastian faded as mist in the middle of them.
So, i read the last chapters of the "Kuroshitsuji" manga and this plot bunny appeared in my mind during bath and i needed to write this. Sorry if anyone is upset by this one-shot, but i really needed to release the stress after that, and wath better way than trough basically using al the mental problems and traumas that Ciel had in his life and write wath could happen if he had a really bad mental breakdown