Some psychological manga or manhwa? I've just read funouhan and want sth similar or whatever
https://www.mangago.zone/read-manga/preta/
It is not similar but it is psychological
https://www.mangago.zone/home/mangalist/845544/
Some psychological/horror manga
Being possessive isn't romantic but it is making story more interesting than how it was before and I like to see what is going to happen next