Heeseung, Jake and Sunghoon.

Heesung is a guy, 22 years old, height 178 cm. He is wearing a black sweater and black loose pants. He has dark sneakers and cherry-colored hair.
The killer, Sunghoon, is 22 years old and 179 cm tall. He is wearing a gray T-shirt and black loose pants. His sneakers are white. Sunghoon himself has black hair.
Jake-Kubiyua too, along with Sunghoon. He's wearing a black sweater, unbuttoned, and a white T-shirt. His pants are black and loose. His sneakers are white. His hair is the color of dark chocolate.

Heesung was walking home after work. He decided to take a 20-minute shortcut. Heesung turned down a dark alley and walked home. He'd never liked this road, as there were few streetlights and no cameras. Jake suddenly stepped out in front of him, brass knuckles in hand. He looked friendly, but appearances were deceiving. Sunghoon stepped out from behind, looking cold but often grinning dangerously. He had both a knife and a gun in his pocket. Heesung glanced at everyone; it seemed his fate would be decided right then and there.
(Sunghoon and Jake are killers.)