Yaoi / romance manga with middle aged men?

I reccomend this~ it's so cute. http://www.mangago.me/read-manga/ojiichan_shinanai/

I love older characters, here are a few
Queen and the tailor http://www.mangago.me/read-manga/joou_to_shitateya/
Jealousy - http://www.mangago.me/read-manga/jealousy_scarlet_beriko/
Stroboscope- http://www.mangago.me/read-manga/good_morning_bad_day/bt/274004/Vol1_Ch1
Momentum- http://www.mangago.me/read-manga/momentum_park_ji_yeon/

http://www.mangago.me/read-manga/because_of_you/?av=1
http://www.mangago.me/read-manga/the_perfect_relationship/
Sequel of Young bad education: http://www.mangago.me/read-manga/young_good_boyfriend/
http://www.mangago.me/read-manga/eiyuu_to_kosodoro/
http://www.mangago.me/read-manga/honto_no_uso/
http://www.mangago.me/read-manga/reversion/
Not really an old man but looks like one with that unshaved beard so... http://www.mangago.me/read-manga/yamada_to_shounen/
Not an old man but looks like one: http://www.mangago.me/read-manga/ii_ko_ii_ko_shiteageru/

And I saved the best for last: http://www.mangago.me/read-manga/on_doorstep/

This mangaka has lots of ojisans in her stories http://www.mangago.me/read-manga/ren_ai_nenrei/

http://www.mangago.me/read-manga/negaigoto_wa_hidamari_de/...hasn't been updated in 4ever though but what is there is a good read

They all match to what you requested

“How Sweet Is A Sugar Daddy”- http://www.mangago.me/read-manga/how_sweet_is_a_sugar_daddy/?av=1
“Unfather”- http://www.mangago.me/read-manga/unfather/
“The Priest’s Chart”- http://www.mangago.me/read-manga/the_priests_chart/
“Kore Ore Ga....”- http://www.mangago.me/read-manga/kono_ore_ga_ahe_goe_nante_dasu_wake_ga_nai/
“Strawberry Combat”- http://www.mangago.me/read-manga/strawberry_combat/
“Hana wa Saku Ka”- http://www.mangago.me/read-manga/hana_wa_saku_ka/
“Toshi no Sa x Omegaverse”- http://www.mangago.me/read-manga/toshi_no_sa_x_omegaverse_bl/
“Kuzu Seito to Stalker-sensei”- http://www.mangago.me/read-manga/kuzu_seito_to_stalker_sensei/

Well pretty much all I can come up with atm