STARVING

Big age gap: https://www.mangago.zone/read-manga/the_honest_life_of_a_game_studio/
There are a few generational gap jokes in there, too.

Lip Smoke

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

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

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

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

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

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

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

love you all
itadakimasu! ლ(´ڡ`ლ)