sumino takumi, the hundred line -last defense academy-, 1boy, ahoge, armband, black hair, black jacket, blue eyes, buttons, character name, closed mouth, cropped torso, hair between eyes, hole in chest, hole on body, jacket, last defense academy school uniform, long sleeves, male focus, multicolored hair, nyab oo, red hair, school uniform, short hair, simple background, sketch, smile, solo, streaked hair, two-tone hair, white armband, white background