Book Five: Necromance of Black

The fifth book in the series, "Highschool Project: Necromance of Black," details the events in which a group of Devil-Slayers, the Shinriyoku, attempt to slaughter the devil race in an attempt to save the other magical races.

Set in the summer of 2022, the book begins when Black Crown begins to run into mages who had previously died, locating the cause to be the Shinriyoku, who being their conquest to slaughter the devil race.

Below is a summary of each chapter.

Chapter One: Reverberate
After receiving multiple visions of hooded figures, Zane attempts to locate Divinos, but instead runs into the previously-dead Shota Tsukomi, the Hellfire Dragon-Slayer, who engages into battle with him.

Chapter Two: Tale of the Free
Lucy and Kristina visit the church, where they learn about the Shinriyoku's origin and it current members.

Chapter Three: A Disorder of Population
Amber and Hailey encounter Reaper Kurosami, who informs them that there's trouble stirring up in the Underworld. After catching up with Kieron and Mio, they encounter two members of the Shinriyoku — Beast and Itsuki Echo.

Chapter Four: The Encompassing Truth
Zane, along with Hailey who catches up with him, meets with Hazel Origami, the younger sister of the SZ-Class Mage, and strongest member of Black Crown, Divinos. After getting into contact with him, they learn that they must go to the Underworld and stop the Shinriyoku's secret ploy.

Chapter Five: Fear Encased
Reaper Kurosami and Amber meet with the Council of Twelve, who helps them put together the Shinriyoku's plan and they're current actions up until that point. Meanwhile, Lance and Jay learn that one of the largest cities in the Realm of Fallen Angels had recently been massacred by Devil-Slayers.

Chapter Six: The Parallel Ideals
After wrapping up for the day, Zane receives another vision of the Shinriyoku — this time he sees the Blood Devil-Slayer, Itsuki Echo, in the midst of a conversation with a little girl who survived one of his attacks. With his new information, he and Amber devise a plan to root out the Shinriyoku.

Chapter Seven: A World Soaked in Red
Just before they can put their plan into motion, Amber and Zane discover that ten-percent of the devil population and been slaughtered overnight. With clues from Lance and Jay, the two, along with Kieron, head to the Realm of Fallen Angels and attempt to confront the Shinriyoku head-on; however, they find themselves separated.

Chapter Eight: Leaves from the Wisdom Tree
Zane is ambushed by Asami Akatsuki and Yohan Emiyo — the Nature and Wind Devil-Slayers respectively —forced to engage into battle with them, while questioning them on their motives.

Chapter Nine: Challenge on a Different Scale
Lance and Jay are able to successfully intercept one of the Shinriyoku's ploys, facing off with two of their members — Escalus Genki, the leader and the Shadow Devil-Slayer, and Yazetsu Espada, the Earth Dragon-Slayer — who put their ideals and beliefs to the test.

Chapter Ten: Eyes of Deception
Kieron and Amber find Zane, who is reaching his limit in his fight with two of the Shinriyoku. After successfully driving the two Devil-Slayers off, they return back to the mortal world, only to discover that more and more devils are being slaughtered.

With a helpful tip from Reaper Kurosami, they decide to travel to Japan and learn more about the origin of the Shinriyoku and how to defeat them.

Chapter Eleven: The Callous Train
Taking a train in Japan to go and meet with the devil who taught the leader of the Shinriyoku, Zane, Amber and Kieron are attacked by Beast, who lands on top of their train and threatens to kill every mortal present.

With no other choice, Kieron heads to the top of the train and engages into a fight with the Fire Beast-Slayer.

Chapter Twelve: Tale of Mystery
Kristina and Mio encounter the Soul Devil-Slayer, Kikio Kentaro, and the Sound Devil-Slayer, Ryuji Sayuri, in the mortal world. Engaging into battle with them, they're eventually pushed back by the combined efforts of the Devil-Slayers, but are surprised to find who comes to their rescue.

Chapter Thirteen: A Fatal Blow
Learning of possible deception within the ranks of the Underworld, Lance and Jay head to the Underworld's capital, only to find that it had been completely destroyed and wiped out by a mage wielding Ice Magic.

Meanwhile, Zane, Amber and Kieron learn the story of Escalus, the leader of the Shinriyoku, and the location of his base. However, they find that there's a large disturbance down in the Underworld, deciding to split up.

Chapter Fourteen: Stars of Darkness
Traveling to a parallel dimension created by Escalus, Zane and Kieron engaged into a fight with the leader of the Shinriyoku. Meanwhile, Amber heads to the Underworld to assist Lance and Jay in their fight against the SZ-Class Devil-Slayer, Glacies.

Chapter Fifteen: The Strings of Fate
Escalus pushes Zane and Kieron to their limits on both a physical and fundamental level, revealing to them their master plan on how they'll exterminate the devil race. Meanwhile, Black Crown struggles to bring down Glacies, whose true identity shocks them to the core.

Chapter Sixteen:
Forced to retreat, Zane and Kieron meet up with Kristina and Mio; together, the four of them make their way into the Underworld, where they're able to successfully push Glacies back. Later, they meet with the Council of Twelve to discuss the current situation.