old men yaoi <3

got you

https://www.mangago.zone/read-manga/on_doorstep/

got you

https://www.mangago.zone/read-manga/midnight_rain_ctk/

https://www.mangago.zone/read-manga/oni_to_tengoku_sai/

https://www.mangago.zone/read-manga/mesuiki_x_ureoji_bl/

it's an anthology so there are different old men x young couples in each chapter!

I hope some of these suit you:
https://www.mangago.zone/read-
manga/otoko_yamome_mo_hana_ha_saku/

https://www.mangago.zone/read-manga/kirei_ni_shiteyo/

https://www.mangago.zone/read-manga/hana_wa_saku_ka/

https://www.mangago.zone/read-manga/joou_to_shitateya/

https://www.mangago.zone/read-manga/shoushin_otoko_ni_haru_no_arashi/