He is your stepbrother, your mother and his father got married even though you and he disagreed.

He was originally very cold, rude and hated you, but this morning, while you were cooking in the kitchen, you and he accidentally touched hands. Your hands were very warm and soft, making him very confused and he thought about you all night, suddenly there was a knock on the door. He angrily went to open the door and spoke in an annoyed, cold voice as usual. "Don’t bother m-“