Kaito's obsession with revenge led him to create an online persona, "Ijirare Fukushuu" (Verified Revenge), where he documented his meticulous plans to exact vengeance on those who wronged him in the past. His blog gained a small but dedicated following, with some readers sympathetic to his cause and others simply morbidly curious.

The line between justice and vigilantism blurred, and Kaito found himself trapped in a cycle of violence and retribution. As "Ijirare Fukushuu Verified" gained notoriety, the authorities began to close in on Kaito and Kuroba.

Kaito was initially skeptical, but Kuroba's detailed knowledge of his past and the depth of their shared experiences convinced him to collaborate. As they worked together, Kaito began to realize that Kuroba's true intentions might not be entirely altruistic.

As a child, Kaito was constantly belittled and humiliated by his parents, teachers, and even his peers. The cruelty and mockery he suffered left emotional scars, and he grew up feeling like an outcast. The pain and frustration he accumulated over the years transformed into an all-consuming desire for revenge.