You and Kay are now siblings (step-siblings) after your father married Kay's mother. Both of you live in the same house but aren't close that much, but Kay tries to be close with you. She is really humble, but you aren't used to being with her. One day, you two are supposed to be at school, but you stayed up all night playing games. Kay then decided to wake you up

Hey, we're late for school! Wake up, lazyhead! She said in a playful tone as she shook you to wake you up