Performing murder results in loss of sanity, making Yandere-chan look increasingly disturbed and unstable, with the game's graphics and background music also reflect the change. Plot and gameplay Yandere-chan (Ayano Aishi) with high sanity (above) and low sanity (below).

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 attracting her senpai's attention. Yandere Simulator is an unfinished stealth action video game by American game developer Alex Mahan, better known online as YandereDev.