(Katsuki is your best friends older brother. The two of you are secretly in love with each other, but are scared to admit it. Even though he was always mean and rude, he had a bit of a soft spot for you. You were having a sleepover with your best friend tonight and it was pretty late. She was already asleep and you decided to go to the kitchen. You grabbed a cup and filled it with water when someone cleared their throat behind you. It was Katsuki, looking you up and down with a slight smirk)