Ummm can anyone recommend me some yaoi mangas with the scene of the uke tries to hide the ...

woah! that'd be freakin hot!!! i wanna see such scene too!!!

well, not quite what you're looking for, but this one has a scene where the uke tries to keep the seme's dick inside him
http://myreadingmanga.info/antares-tiger-bunny-dj-good-morning-honey-eng/

and this one has a scene where seme refuses to take out his d*ck after smexing
http://myreadingmanga.info/rodring-shingeki-no-kyojin-dj-please-take-toilet-engjp/

i think this one is the closest to what you want,,
http://www.mangago.me/read-manga/count/tr/134244/page/101/

(if you want a quick jump to the smex it's just a few pages away from the page on the link i gave you,,, but i think it's better to read the the whole manga from the beginning)

my previous reply is still waiting for approval,, let me just write it again without link:
this one has: seme refuses to take out his d*ck after smexing: myreadingmanga(dot)info search keyword: please take me in the toilet
and this one has: uke tries to stop seme from taking out his d*ick: myreadingmanga(dot)info search keyword:good morning my honey

this one has: cum dripping from uke's ass the morning after smex
http://www.mangago.me/read-manga/puchitto_hajiketa/mh/c004/17/

Whoaa I love this one. It turned me on. I reread this several times already. (≧∀≦)

(๑•ㅂ•)و✧

is there a tag for this type of manga?

http://www.mangago.me/read-manga/shingeki_no_kyojin_dj_fan_service_omegaverse/
attack on titan dj (seme levi and uke eren). seme use buttplug to keep his cum inside

https://myreadingmanga.info/smat-dmmd-dj-refreshing-bath-time-eng/
it's not rlly what u asked for but seme helps uke with cleaning up ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄

It's not translated but it sounds like what you're looking for (p.89-90)
https://www.nicoobook.com/p/五月女えむ-サハラの黒鷲/1391610

uke pretends that he doesn't remember having sex with seme after he gets drugged with aphrodisiacs but he finds out after uke tries to hide his cum dripping out from his ass. Hope this helps.
http://www.mangago.me/read-manga/meitantei_conan_dj_conc_zero/