2boys, armor, battle, black_gloves, black_legwear, duel, from_behind, gloves, holding, holding_weapon, horns, japanese_armor, jikan_sokougun, katana, male_focus, menpoo, military, military_uniform, multiple_boys, purple_hair, red_background, red_eyes, short_sword, shorts, shoulder_armor, size_difference, skeleton, sode, standing, sword, tantou, uniform, weapon