nii manabu, maru tomokazu, gimai seikatsu, official art, 3boys, anime coloring, back, black hair, breasts, brown shoes, clenched hands, closed mouth, collared shirt, from behind, from side, full body, glasses, grey pants, greyscale, hand up, large breasts, looking at viewer, monochrome, multiple boys, multiple views, necktie, pants, profile, school uniform, semi-rimless eyewear, shirt, shoes, short hair, short sleeves, simple background, smile, standing, transparent background, under-rim eyewear, untucked shirt, very short hair, white shirt