I know I should have explained this in the first chapter, but stupid me didn't think. So I'll explain it now. I thought, if somehow, the seal of Ciel's and Sebastian's contract was ruined in any way, the contract didn't count. Ending it. I know in the anime, Sebastian lost his arm holding the seal, but it wasn't damaged, but I'm just thinking this :P Anyways;
Disclaimer-I do not own Kuroshitsuji (Black Butler) or any of its characters ;_; All of it belongs to Yana Toboso, the wonderful woman who created this amazing anime/manga.
Unbearable Pain
Chapter Two

Beep! Beep! Beep! Bee-
Ciel slammed his hand down onto the alarm clock, shutting it up from its annoying noise. Ciel didn't even have to look at the calendar or his phone to know what day it was. He sat up, his hair falling over his eyes. He reached up, putting a hand over his right eye, remembering the day where he and Sebastian seperated.
That day. . . it feels like it was just yesterday when he shouted such hate filled words at Sebastian who yelled back. That's when Ciel lost it, taking up the scissors, holding it right in front of his eye that held the seal of the contract. And. . . then he. . . I. . .
"This is what I have to do to get rid of you," I whispered softly, giving him one last look, my eyes filling with tears. I gripped the scissors, pointing the tip in front of my pupil, tears streaming down my face. "I'm sorry," With one last look at his worried face, I brought the sharp object to my eye.
"Ciel, no!" Sebastian lunged at me, reaching for the scissors.
Ciel let out a horrific scream, feeling dizzy as he collapsed onto the floor, unconscious.
Ciel shook his head, trying to get rid of the memory he fought so hard to forget. The memory continued to play in his mind like a movie, Ciel watched reluctantly as the vivid memory of that day played in his head.
"...el!"
". . . iel!"
"Ciel, please, wake up! Say something! Anything!" The voice cried out.
Ciel drifted in and out of consciousness. His whole body felt heavy and numb. His head hurt. . . as did his eye. Trying to open them, he winced, feeling a sharp pain rack throughout his body.
"Please. . . Wake up. Say anything. . . yell at me, scream, or blame me! Just. . . open your eyes. . . for me. Please!" The voice pleaded. The voice sounded heavy as it sobbed. Ciel felt something clutch at his shirt lapels, feeling something wet and warm land on his cheek, running down his neck, drop after drop. Were these tears? Ciel thought, not knowing whether if they were.
"Please. . . I hope you're okay. . . Ciel."
Ciel let his name bounce around in his head. Confusing him. Mocking him. Never before had Ciel ever heard his named called by Sebastian that was so full of remorse, pain, and suffering. . . Why does Sebastian feel this way? I brought this upon myself.
Ciel then felt a large, warm hand slid into his, their fingers intertwining together. Feeling Sebastian giving his hand a tight squeeze as if he felt that if he let go, he would lose Ciel forever.
Does Sebastian. . . really care for me this much? To cry over me? We never held hands before, and now, Sebastian was gripping his own tightly.
"If I stopped you in time. . . you wouldn't be like this. This is all my fault, I should've never talked like that to you because. . . well because, I love you, Ciel. Yet, I treated you so badly just to let my anger out, even though you didn't deserve it. . ."
Ciel shook his head furiously. No! Stop! Please! Just make it stop! He gripped the sides of his head, clenching his eyes shut, trying to stop the memory from playing any further. "Augh!" His right eye throbbed, pulsating behind his thin eyelid. He placed his hand over it, his vision blurred as the eye continued to throb.
Ciel threw his legs over the sides of the bed, stumbling to his feet, the sheets falling to the floor, piling up at his feet. Ciel staggered to the bathroom, bumping into the walls, falling every once in a while. Finally he reached the bathroom, he gripped the edge of the wooden counter, using it to keep himself up. He leaned forward, staring at the mirror. His eyes widened in horror, "No. . . it can't be. After all this time. . ."
The scar that ran through his right eye was. . . gone. That scar, white and ragged, running through the seal of the contact, cutting it in half. It was gone, like as if it was never there. This could only mean. . .
"He's back." Ciel whispered.

If you couldn't tell, Ciel did do it, and sadly enough, Sebastian didn't stop him in time. If you want me to go into gruesome details of how it went down, I'll add it in the third chapter. And holy chiz everyone, Sebastian just said he loved Ciel.
~Otaku