Young Gun Carnaval (ヤングガン・カルナバル, Yanggugan Karunabaru) is a Japanese light novel series written by Makoto Fukami and illustrated by Tow Fukino.

The series centers on two teenagers, Kogure Jinpachi and Yumika Tetsuyoshi, who are members of an underground vigilante-type organization called Hybrid, which specializes in targeting and assassinating individuals in cases where Japanese law enforcement agencies cannot apprehend them by legal means.

The chapters focus on Kogure and Yumika and their interactions with the high school students of Kouenzi High, their comrades and superiors as operatives of Hybrid and the memories they had of their past prior to their recruitment into the organization.

Kogura Jinpachi is a manga research club member in Kouenzi High School, whose parents were killed when he was a kid by assassins from the Phoenix Syndicate.

Though in reality they are members of Hybrid, an underground vigilante-type organization whose duty is to hunt and punish criminals who can't be judged by the law.