Rule 34 Dev - 1boy bad_id bad_pixiv_id beatmania_(series) beatmania_iidx bemani blush fingernails halo head_tilt long_fingernails long_sleeves looking_at_viewer male_focus mars_symbol monochrome mutsutake navel open_clothes open_shirt rche_(beatmania) ribbon shirt short_hair solo star_(symbol) sweat tears trap upper_body wings|4029278643