Black Butler boyfriend/girlfriend scenarios

When you/they gets jealous

Sebastian- Sebastian knew that he was your brother, but it still bothered him. You couldn't stand seeing you around anyone else, not even your brother, Claude. He wondered how something like you, could even be related in the slightest to someone like him. Nevertheless, he still couldn't keep you away from Claude, seeing as though it would make things between him and Claude worse than it already was. Sebastian couldn't stand it any longer, he felt as though Claude was trying to take you away from him. You, who was currently talking to your brother, were surprised as Sebastian pulled you away. Claude was Furious, not only did Sebastian have Phantomhive's soul, he now had his sister. Claude had began to confront Sebastian about taking you away from him. You stopped him when he appeared in front of the two of you. You sighed," You both are pathetic. Claude, Sebastian isn't going to make me stop seeing you. Sebastian, Claude isn't  going to make me hate you. I wish you both would just understand that!" They both avoided eye contact and said at the same time, "Ok, I understand."

Ciel- Lizzy had been making more frequent visits to the manor, and this bothered you. Even though he constantly assured you he was going to cancel his engagement to her, he is yet to do this. Today just happened to be one of the days Lizzy stopped by. Ciel was intent on keeping her happy, and this annoyed you. If he really loved you as much as he said he did, he would break it off with Lizzy. Ciel noticed you looked upset and asked to talk to you in private,"(Y/n), what's wrong?" You answered him with, "Lizzy, you told me you were going to cancel your engagement to her!" "(Y/n), I promise I will when the time is right. Then I will let everyone know that you are my one and only," he told you. Later that week, Ciel called for the Midfords to come so he could make an announcement. When he told them, they were confused on why he wanted to be with you, a commoner, rather than their daughter, a noble.  Ciel kept his promise and made it clear that you were his and his only.

Alois- Lets just say that at an event at the Trancy estate, another noble came up and started hitting on you. Alois didn't take to kindly to this. Instead of confronting him, Alois just came up to you and licked the side of your face. On the bright side, no other guy bothered you any more!

Grell- You and Grell had been friends, and dating, for a long time. Even so, she fails to understand the fact you had other friends, and he would often get jealous when she saw you talking to other people. This was the case when you and, another great friend of your, Ronald were talking. Ronald could sometimes flirt and joke around, but he never took it too far. Grell still didn't like this, and at every opportunity would try to pull you away from Ronald. Ronald noticed Grell was jealous and decided to take things even further than usual. Ronald came back up to you when Grell walked away, and put his arm around you, putting his hand somewhere where it shouldn't have been. Grell noticed and started going towards Ronald, but by the time she got there you had already kicked Ronald somewhere and he was down on the ground in pain.

Undertaker- You were on your way to work when a man stopped you, asking you to go out to eat with him. You kindly explain to him that you have a boyfriend and your on your way to work, at his business. He apologized and you kept on your way. It was strange, he seemed to be following you. To test this, you walked around one way and came out he other and he was still there. You ran to your boyfriends work, and told him what had happened. He got jealous because no one goes anywhere with you, besides him. He stepped outside, and the man stood there. Undertaker came back in, and you never saw that man again.