What?

1girl, solo, 18yo, medium breasts, sweat, school uniform, collared shirt, short sleeve, white bra visible through clothes, red tie, beautiful detailed face and eyes, frown, black hair, short hair, blunt bangs, hair intakes, black eyes, glasses, from behind, looking at viewer, school, classroom, portrait, summer, anime artwork, anime style, key visual, vibrant, studio anime, masterpiece, best quality