Two in Six Billion - not mutual fucked up but yeah it's good
https://www.mangago.me/read-manga/two_in_six_billion/
Ghost of Paradise - this is interesting, not sure if this is yandere but similar
https://www.mangago.me/read-manga/ghost_of_paradise/
Circle Trap - this one has everything you described but not really yandere, it does have confinem......
