Responses
for old-ish seme just try something from naono bohra http://www.mangago.zone/read-manga/everyday_smile/
darker yaoi's wiht older seme
http://www.mangago.zone/read-manga/sono_kuchibiru_ni_yoru_no_tsuyu/
http://www.mangago.zone/read-manga/ouji_no_hakoniwa/
http://www.mangago.zone/read-manga/aiso_tsukashi/
or try this tag
http://www.mangago.zone/people/tag/83677/older+seme%2Fyounger+uke/?page=1
looking for an old-ish business man seme.
like search for 'hannibal series' yeah hannibal kind of guy.
also if you read 'itou-san' (so good)
im looking for something similar. thanksss :-)