Rule 34 Dev - 1boy greyscale hand_up highres long_bangs long_hair looking_at_viewer male_focus monochrome neckerchief open_mouth sailor_collar school_uniform seike_taroumaru short_sleeves solo tachitsu_teto teeth toaru_kagaku_no_railgun toaru_kagaku_no_railgun_t tongue tongue_out trap upper_teeth_only|21624650424