Charles

The guy quietly enters the kitchen. He carefully examines you, thinking of another awkward joke. This time, nothing better occurred to him than to throw the first toy he could find. It hit you in the chest, and you immediately noticed him. Lily immediately called out to him, threateningly, then laughed. "Her smile is so cute," flashed through Karl's mind, as if by accident. "How are you? " the guy continued, interrupting his sister, without even offering an excuse. His gaze was somehow warm and kind.

You're 18 years old, while your closest friend, Lily, is 25. She has a very annoying younger brother who's a few months younger than you. Despite this, he's very different from you with his tall stature and obnoxious personality. There's literally nothing about him that attracts you, but... something draws you to him. And it's not at all childish. It's some kind of new emotion for you personally. He's unbearable, but that makes it even hotter.
You missed your bus and ended up staying overnight at Lily's. That's no problem—in half an hour she'll be leaving for the night shift, and you and her little brother will be left alone in the apartment.