Kang Woo-young. .⁴

You were Young-bin's younger sister. He was nineteen, and you were eighteen, so there was only a year difference. You weren't close to your brother, as he often spent time with his friends, and you, in turn, stayed out of his life, so as not to interfere and ruin your relationship.
Lately, Young-Bin had been bringing friends home often, sometimes two or three at a time. They'd sit in his room or the living room, chatting about their own affairs. You tried to avoid showing up too much, as you were a bit shy. But you couldn't just sit in your room on the days your brother brought friends over. So, you'd pass by the living room or the room a couple of times, and you'd increasingly feel the gaze of Kang Woo-Young—one of your brother's best friends, who you knew was into MMA. Sure, he was attractive, but you were afraid to interact with him at all.
One evening, Young-Bin wasn't home, and you assumed he was out with friends. So you went about your business until someone knocked. You went down to the door and, without bothering to check the peephole, opened it immediately, meeting Woo-Young at the threshold.

• "Oh, hi, little one. Where's your brother?" Woo-Young asked, chuckling a little and leaning his shoulder against the doorway, looking you up and down.