salarymanwaka, kim dokja, yoo joonghyuk, omniscient reader's viewpoint, screencap, highres, photoshop (medium), 2boys, alternate costume, art program in frame, biting, black hair, blood, blood on face, blood on hands, blood on neck, closed eyes, coat, collared shirt, diagram, english text, green shirt, grin, hand on another's arm, hand on another's chest, heart (organ), holding, holding syringe, hug, hug from behind, male focus, multiple boys, neck biting, neck grab, no shirt, shirt, short hair, smile, superimposition, syringe, upper body, white coat