kang yiqian (self cultivation), infection monitor (arknights), lumen (arknights), lumen (golden dream) (arknights), ambience synesthesia, arknights, highres, official art, third-party source, 1boy, armchair, belt, black belt, black hair, black pants, blue eyes, blue hair, book, book stack, bookmark, briefcase, buckle, chair, choker, closed umbrella, coat, couch, curtains, cushion, desk lamp, finger to mouth, fins, fringe trim, full body, hair between eyes, head fins, holding, holding book, index finger raised, indoors, lamp, long sleeves, looking at viewer, male focus, multicolored hair, official alternate costume, on couch, open book, open clothes, open coat, pants, paper, pen, plant, pointy ears, potted plant, quill, rug, shirt, shoes, short hair, shushing, sitting, smile, socks, solo, suitcase, table, thigh strap, transparent background, umbrella, vase, white coat, white shirt, white shoes, window, wooden floor