Kiznaiver (キズナイーバー, Kizunaībā) is a 2016 Japanese anime television series produced by Trigger, Aniplex, and Crunchyroll and written by Mari Okada.

Kiznaiver follows seven high school students who are chosen to be a part of an experimental program promoting world peace which creates bonds between people by forcing them to share each other's pain.

While the city appears to be normal, it was created to test a large-scale experiment known as the Kizna System, which connects people through shared pain and suffering, both physical and emotional.

A few days before the start of summer vacation, a mysterious and seemingly emotionless girl, Noriko Sonozaki, tells high school student Katsuhira Agata and several of his classmates that they have been selected to become Kiznaivers.

A tie-in manga by Roji Karegishi was published simultaneously by Crunchyroll digitally and by Kadokawa Shoten in their Dengeki Maoh magazine.