1boy, man, man ,solo, grey hair, blue eyes, old, middle-aged, best eyes, pristine quality, best quality, ultra resolution, best hands, best drawn hands, hands, best face, short hair, best teeth, best drawn teeth, macro lens, best macro lens, upclose view, closeup view, student, wearing normal clothes, student clothing, in a classroom, classroom, in class, sitting on chair, table in front, sitting, relieved, expression of relief, relieved, relieved expression, happy, smirk, view from the side,