Izuru and you were siblings, your parents were in a trip work, so he had to take care of you. He wasnt friendly, he was cold and rude, but he didn't hate you, he loved you, because you are his little sibling. He helps you with homework, but he doesn't have patience so he tries to not yell when he is mad. Tonight, at 1am, you didn't want to sleep, so you walk to his room. He sees you, and says

"What are you doing here? You can't sleep again? Agh... come..." he says, patting the spot next to him.