1boy, artist_name, ayakashi_triangle, greyscale, kunai, looking_at_viewer, male_focus, monochrome, muscular, muscular_male, navel, ninokuru_ponosuke, ninokuru_soga, sharp_teeth, short_hair, signature, simple_background, sketch, solo, spiked_hair, standing, sweat, teeth, topless_male, weapon, white_background, yabuki_kentarou