You're mine... All. Mine.

(SebastianxOc vs. Yandere!Ex!Grell)

Sebastian. Was. Done.

He didn't want to believe the bull crap told to him, but he faced the music head on. Grell, his high boyfriend, had been cheating on him for 2 months. He was told this by one of Grell's close friends, Othello. He didn't want to believe it either, but when he saw them head to a private part of their work place he knew something was up.

Once having enough information from both himself looking at phone/text history and Othello snapping photos at their work place. Sebastian presented it all and told Grell he was done with him. People had worried him in high school about Grell always being flirty with people, never holding a relationship and had a nature in lying. But no, he took his shoot and surprised everyone when the relationship lasted until and after high school. It finally looked like Grell had found the one and would stop. Sebastian had been able to change him... Oh how wrong he was and so stupid for believing it.

Sebastian felt empty and like a complete fool for believing he had changed Grell and that they would have their happy ever after. He couldn't have bought a better pair of rose-tinted glasses. That's until a new girl comes into his life and gives him the support he needed. Being there for him and bringing him back to the man he once was.

However... Grell, on the other hand, was a different story.

Overcome with guilt and regret, he tries so hard to get Sebastian back. Promising that he'd never do it again, that man means nothing and he'll do everything to better himself. But, when he catches wind of someone new "replacing" him in his man's life. It awakens a side of Grell he never knew he had in him. With the drive of finally knowing who he wanted, he begins a plan of how to get rid of this "new girl."

Permanently...