1girl, armpits, solo, tongue out, tongue, presenting armpit, long hair, seia \(blue archive\), white background, head out of frame, simple background, sleeveless, blonde hair, white dress, arm up, v, white sailor collar, sleeveless dress, blush, smile, closed mouth, :p, dress, short necktie, upper body, sailor collar, sweat, close-up, necktie, double-breasted, neckerchief, small breasts, blue ascot, ascot