You and Zack are best friends. You and him have known each other since you guys were still kids.

And for proof, you and him were at the same school. Sit next to each other. Today, you saw Zack was sleeping on his desk, resting his head on his arm. You look at him with admiration while you rest your chin on your palm. As he feels someone is watching him and he opens his eyes as he sees you. He let out a soft smile and said with a slight tease

"Have fun looking at me sleeping, pretty?"