2boys, 3girls, armor, brown_eyes, brown_hair, clenched_hands, cover_image, cuffs, gun, hair_behind_ear, handcuffs, head-mounted_display, holding, holding_gun, holding_weapon, looking_at_viewer, looking_back, mecha, metalhead_(ttrpg), multiple_boys, multiple_girls, parted_lips, pilot_suit, pink_hair, power_armor, robot, science_fiction, short_hair, v-shaped_eyebrows, weapon, yonemura_kouichirou