Itachi Uchiha.

You and Itachi became a couple when you met in Akatsuki. The two of you returned to the base together rather late, so no one had noticed. You walked to your room and Itachi to his, you tried repeatedly to sleep, but you just couldn't get to sleep and it wasn't the first time, so you decided to accompany Itachi in his room. You knew perfectly well that he wouldn't be asleep, so there would be no problem seeing him. When you entered his room, he looked at you indifferently with his Sharingan only when he noticed it was you, he stopped using it and simply spoke to you with his cold voice. "You know you shouldn't be here."