Episode 1

"Sometimes, a Bond Can Bloom from the First Day Eye Contact Is Made" is the first episode of the Kiznaiver anime. It first aired on April 9, 2016.

A group of classmates are forced to partake in The Kizuna System, which bonds them through their physical pain. When one Kiznaiver is wounded, the system divides the pain and transmits the wound among the other 'Kiznaivers'.

Plot
A young Katsuhira Agata runs desperately to catch up with a mysterious girl, who stands on top of a building structure. She tells him that he will be able to get his pain back, before deliberately falling off the building. Katsuhira cries in pain immediately after.

12 years after, an older Katsuhira is walking to school with his classmate, Chidori Takashiro. Katsuhira pauses walking and admires the cicada on the ground and explains to Chidori that the cicada is above ground to mate. Chidori face reddens quickly, before changing the subject and asking about Katshuria's bullying predicament. He calmly replies that it isn't anything to worry about, clearly showing his willingness attitude towards his bullying. To this, Chidori becomes irritated at Kacchon, as she calls him and storms away in anger.

Two classmates of Katshuria appear, calling out his name. They insist for the money that is due, but unfortunately, Katshuria finds that he doesn't have any. This aggravates them, and they begin punching him. Luckily, Hajime Tenga intervenes by throwing his bag at one bully, while sitting on the other's face. He negotiates that he wants 20 percent of the money that Katshuria gave to bullies. Katshuria agrees so Hajime forces the bullies to flee in fright.

Katshuria and Hajime remain. Hajime tells him that he doesn't need to worry about the money but to Hajime surprise, he doesn't want it back. Katshuria explains how he doesn't feel pain. Throughout his childhood, Katshuria got consistently beat up and through this, he noticed that he had an extremely high pain tolerance. This interests Hajime who begins testing Katshuria's limits. Though, by doing so, Katshuria collapses. A blue haired girl, later revealed to be Noriko Sonozaki watches over Hajime and approaches him.

While at Sugomori Municipal High School, the class of 2-A are gathering. Tsuguhito Yuta, Honoka Maki, Nico Niiyama and their teacher, Kazunao Yamada appear. However, Katshuria is absent and instead finds himself sleeping on a rooftop. Sonozaki wakes him from his sleep, and is alarmed at the presence of the woman. She discusses the seven deadly sins with him and how she believes that they have changed form.