やる時はちゃんとやるヤツ

Anime/manga style illustration of a teenage boy in a slightly crumpled school uniform with a messy tie, wearing a half-smirk and sharp eyes, arms crossed loosely yet with tense shoulders, standing in a dim grey hallway, strong dramatic lighting from upper left casting sharp shadows, dark blue and muted grey tones with a single window casting white light, expression showing both defiance and hidden competence, contrast between laziness and intensity.