
i want old man Yaoi

https://www.mangago.zone/read-manga/my_x_daddy/
https://www.mangago.zone/read-manga/god_s_man/
https://www.mangago.zone/read-manga/pocket_n_7/
https://www.mangago.zone/read-manga/blue_quicksand/
https://www.mangago.zone/read-manga/master_x_secretary/
https://www.mangago.zone/read-manga/young_bad_education/
https://www.mangago.zone/read-manga/young_good_boyfriend/ (sequel of young bad education)
https://www.mangago.zone/read-manga/oni_to_tengoku/ (not exactly old but bottom looks old. he is only 34 or smth)
https://www.mangago.zone/read-manga/oni_to_tengoku_sai/ (sequel of oni to tengoku)
almost every single one of these are red flagged stories. especially the first four. for young bad education and oni to tengoku just trust the process.

I don't know the range of your old man yaoi, but this is what I can reco, my fave xD https://www.mangago.zone/read-manga/midnight_rain_ctk/
recommend me GL stories whether it might be bad or good psychological or slice of life just want GL
Kitanai kimi ga ichiban kawaii
https://www.mangago.zone/read-manga/run_away_with_me_girl/
^SO good
https://www.mangago.zone/read-manga/distorted_love_gl/
https://www.mangago.zone/read-manga/lass_2/
https://www.mangago.zone/read-manga/handsome_girl_and_sheltered_girl/
https://www.mangago.zone/read-manga/you_are_my_angela/
^and her other works
https://www.mangago.zone/read-manga/fly_like_a_butterfly_sting_like_a_bee/
https://www.mangago.zone/read-manga/shoujo_manga_protagonist_x_rival_san/
https://www.mangago.zone/read-manga/living_will/
https://www.mangago.zone/read-manga/our_yuri_started_with_me_getting_rejected_in_a_dream/
https://www.mangago.zone/read-manga/opium/