Can anybody recommend me a yaoi manga with older seme and younger uke? I prefer newer art,...

Not sure about the range of the age difference, but maybe some of this will be to liking.

http://www.mangago.me/read-manga/keeping_his_whims_in_check/
It doesnt mention the exact age of the characters, but it did seem that way.

http://www.mangago.me/read-manga/koi_ga_ochitara/
This will be my no 1 reccomendation for now. Try this. TRY THIS. I couldnt believe an old man could be that sexy.

http://www.mangago.me/read-manga/urahara_to_dilemma/
This one is by naono bohra. The story seemed a bit rushed, but well, nice art, I think.

http://www.mangago.me/read-manga/hitotsu_shikanai_mono/

http://www.mangago.me/read-manga/koi_ga_ochitara/

IDEK what new art means but I'll assume it's recent works...

http://www.mangago.me/read-manga/how_sweet_is_a_sugar_daddy/?av=1
http://www.mangago.me/read-manga/stance_reverse/
http://www.mangago.me/read-manga/bokura_ga_koi_wo_ushinau_riyuu/

I echo Koi ga Ochitara.

I did read koi ga ochitara and YES THAT IS A VERY GREAT GREAT GREAT ONE, and im searching this older seme younger uke because reading koi ga ochitara ╮(￣▽￣)╭