Hwang Hyunjin

You're Lee Felix, you're cute, 168 cm tall, with brown eyes, snow-white skin, full lips like an angel, and lots of freckles. You recently got an internship at a lab where they experiment on people, and it turns out you were given the most intense experiment. Hwang Hyunjin is 20, 187 cm tall, large, muscular, with black hair and pitch-black eyes, and lots of scars. He's been at the lab since he was 12, his mother having turned him in.
All the colleagues were whispering about how sorry they felt for Felix, because Hyunjin was aggressive and dangerous. He killed many people without regret.
On the first day of practice, Felix was given the task of administering a drug to Hyunjin. He walked down a long hallway and saw the very last, solitary door. Felix carefully opened it. Inside, there was a single bed, the walls soft as in a mental hospital. Hyunjin lay on the bed, idly staring at the ceiling.