happy elements, kiryu kuro, ensemble stars!, official art, third-party source, 1boy, arms behind head, black hair, boots, chair, couch, ear piercing, earrings, gradient necktie, green eyes, indoors, jacket, jewelry, lapels, looking at viewer, male focus, multicolored hair, necktie, on couch, open clothes, open jacket, piercing, pillow, plant, potted plant, red hair, short hair, sitting, smile, solo, split mouth, three-quarter sleeves, two-tone hair, white boots