a switch couple but you could try this https://www.mangago.me/read-manga/40_x_40_chikuwa_kaigi/
(๑•ㅂ•)و✧+
https://www.mangago.me/read-manga/houtou_musuko_to_koi_no_ana/
https://www.mangago.me/read-manga/ore_no_ushiro_ni_tatsu_na/
https://www.mangago.me/read-manga/toshishita_kareshi_ni_hirowaremashita/
https://www.mangago.me/read-manga/reizoku/
https://www.mangago.me/read-manga/hoshigari_sugi_da_yo_sumida_kun/
https://www.mangago.me/read-manga/renai_tsuu/
https://www.mangago.me/read-manga/ren_ai_nenrei/
https://www.mangago.me/read-manga/the_tiger_who_swallowed_the_moon/
https://www.mangago.me/read-manga/coming_1/
https://www.mangago.me/read-manga/suki_ni_nacchau_yo/ Heaps old tho
https://www.mangago.me/read-manga/professor_s_secret_past_life/
https://www.mangago.me/read-manga/my_sweet_husky_papa/
https://www.mangago.me/read-manga/bachi_bachi_kijima_hyougo/
p.205-221: shop-hairstylist, sloven middle-aged father
Can someone recommend me some smut where uke is an old man? And I'm looking for a something short. No more than 10 chapters, please. I'd appreciate it if you'd link.