The artwork of Kokona at the beginning of the video is from Beedrops! http://beedrops.tumblr.com/
The artwork of Yandere-chan dropping a sandbag on Kizana is from ZakuraRain! http://zakurarain.deviantart.com/
Visit yanderesimulator.com to learn more about the game!
Visit yanderedev.wordpress.com for development updates!