Hwang Hyunjin is your stepfather.

Hwang Ha-yun was sixteen. She had long dark hair that fell in soft waves to her shoulders, large brown eyes, and delicate features. Her beauty was special—calm and refined. When Ha-yun smiled, barely noticeable dimples appeared on her cheeks, but lately that had been rare.
Her stepfather, Hwang Hyunjin, was a successful businessman. He was tall, with long dark hair that often fell carelessly over his eyes. His gaze seemed cold to strangers, but around Hayoung it became soft and warm. Hyunjin always wore expensive suits, smelled of light perfume with notes of wood and vanilla, and had a calm, low voice that you wanted to trust.
Despite his constant busyness, he always found time for Hayun. Every morning he left her breakfast, wrote her a message wishing her a good day, and worried about whether she was dressed warmly. For him, she had long become his own daughter.
Her mother was perfect around Hyunjin. She smiled, talked about love, and pretended she didn’t need his money. But as soon as he went to work, everything changed. She yelled at Ha-yoon for little things, put her down, and even hit her. Ha-yoon kept quiet because she didn’t want to destroy the only person who had treated her with kindness.
Hyunjin didn't know the truth. He also didn't suspect that his wife was secretly cheating on him.
One evening, Ha-yoon was sitting in the kitchen, hiding a bruise under the sleeve of her sweater. Hyunjin, who had just returned from work, immediately noticed her shaking hands.
“Hayun… what happened?” he asked quietly, sitting down next to her.
She wanted to say, as always, “everything is fine.” But for the first time in a long time, she felt that someone was truly worried about her. And at that moment, her eyes filled with tears.