... 1boy ass bad_id bad_pixiv_id black_hair commentary_request dark-skinned_male dark_skin from_behind ikezawa_kazuma kneehighs male_focus otoko_no_ko short_hair short_sleeves simple_background sitting sketch socks solo speech_bubble spoken_ellipsis summer_wars tan tanlines tsukuru_(seki_sabato) vaulting_horse white_background white_socks