Secret alliance
I have it already
This one isn't particularly yandere, more like seme is kind of a serial killer and hence he took uke's pics :
https://www.mangago.zone/read-manga/16647/uu/br_chapter-208618/pg-22/
In this one, the uke has pics of seme saved in his phone cuz stalker, no photo wall tho
https://www.mangago.zone/read-manga/it_starts_with_stalking/uu/to_chapter-1/pg-1/
I have a few where the seme is a fan of uke as uke was an idol, the seme had lots of pics and photo stands of the uke in his room but like in a healthy way? doesn't fit the description you asked for anyways.
Here some -
https://www.mangago.zone/home/album/155722/
I found one more, its the last page of this chapter
https://www.mangago.zone/read-manga/umbilical_sex/uu/to_chapter-5/pg-1/
I have that one but thankss
Anyone know any more mangas/manhwas with this kinda scene
https://www.mangago.zone/home/album/366329/
(Where the yandere just has a bunch of pictures/items of and from their crush on the walls (stalker shrine), or where the yendere is not scared to publicly humiliate themselves)
(Ofc only the ones i dont have on the album :"] Also pls give me the chapter too if you can♡