Yandere Simulator

Yandere Simulator is a stealth action video game currently in development by American game developer YandereDev. The game centers upon an obsessively lovesick schoolgirl named Ayano Aishi, nicknamed "Yandere-chan", who has taken it upon herself to eliminate anyone she believes is monopolizing her senpai's attention.

https://en.wikipedia.org/wiki/Yandere_Simulator