Obsessing with My Brother's Best Friend

“The man's expression was indifferent, his facial features sharp and well-defined. A faint smile played on his lips, but it never reached his eyes, making him appear gentle yet unapproachable. His slightly upturned peach blossom eyes held light brown irises, exuding a hint of allure when his gaze was lowered. Completely different from her brother's deep black eyes. She had expected to see her brother, but instead, she was met with a stranger, while her brother was nowhere to be found. For a moment, Lily's mind went blank, unsure of how to react. The scene seemed frozen in time. Neither of them moved. Before long, the man lowered his eyes again, slowly and methodically extinguishing his cigarette, his demeanor relaxed and lazy. He didn't seem inclined to speak, remaining silent as he got up to open the window for ventilation. Watching his actions, Lily, feeling lost, hesitantly called out, "...Brother?" That was their first meeting. Later, she would come to understand that he was her brother's best friend. At thirteen, Lily secretly fell for a man. The man had a cold and lazy air about him, spoke with a casual drawl, and often came to her house, spending entire afternoons in her brother's room playing video games. Whenever she went in to deliver fruit or snacks, he would lazily lift his gaze, smiling devilishly, "Kid, what's up with you? You blush every time you see me."”