Mangas with extreme mind break or Stockholm syndrome

killing stalking

https://www.mangago.me/read-manga/sachiiro_no_one_room/

Here's a list
https://www.mangago.me/home/mangalist/267173/

It has a horror and comdey tag so its not that serious but yeah seme is a bona fide serial killer and uke is being held captive and it deals with uhm cannibalistic themes too but not the MC's tho
https://www.mangago.me/read-manga/kansai_jin_to_hukuman_satsujinki/

Warehouse

try digging through these lists
https://www.mangago.me/home/mangalist/1090462/

https://www.mangago.me/home/mangalist/1038439/

https://www.mangago.me/home/mangalist/927142/

Thank you

Thanks

Np :))