I read this a while ago so I don't quite remember it but I am 90% sure it has those things. Hope you like it if you haven't read it already. ٩(๑❛ᴗ❛๑)۶. http://www.mangago.zone/read-manga/kichiku_encount/
I think this one has a similar scenery in it - http://www.mangago.zone/read-manga/hamerare_host/
There's another one I remember BUT in that the seme makes the uke keep his cum in his ass the whole day as punishment.
Oh...and Youjin also has a scene like that in the side story chapters, in case you haven't tried it yet - http://www.mangago.zone/read-manga/youjin/
Hi there
Well from the title I really need a yaoi manga where the seme stick a sextoy in the uke ass (≧∀≦) and let him hang out in public and stick it as a punishment ?? ヾ(☆▽☆)