Light Novel Volume 1

Kaifuku Jutsushi Yarinaoshi ~Sokushi mahou to Skill Copy no Chouetsu Heal~ is the first volume of the series. It is written by Rui Tsukiyo and illustrated by "Shiokonbu", and was first released on July 1, 2017 in Japan.

Official Summary
A young man, Keyaru, hears a voice inside his head directing him to a Star Spirit, who grants him the Halcyon Eye power to see all creation. In a previous life, Keyaru was a healing magician, but his power forced him to see the memories of those he healed. He was captured, abused and forced to heal his captors in battle. In secret, he grew stronger absorbing the experiences of his abusers and learned to use healing magic in unconventional ways. Eventually, he escaped, defeated a Demon Lord and used her Philosopher's Stone to heal the world to four years in the past. With his memories returned, Keyaru swears revenge on his main abuser, Princess Flare of Jioral Kingdom. Flare, who has no memory of these events, senses his awakening and declares him the Recovery Hero. Keyaru has sex with the many maids in the royal household to steal their experience. Keyaru regenerates the amputated arm of grateful swordswoman Kureha, but pretends to pass out. Flare callously orders the court magician to gain control of Keyaru, no matter how torturous the method. Confirming Flare is still as cruel as she was previously, Keyaru begins planning his revenge.Pretending to be afraid of absorbing painful memories, Keyaru swears never to heal again and pretends to allow Flare to imprison and get him addict to drugs, even allowing himself to be raped to further fool her. Flare begins forcing Keyaru to heal injured heroes, but Keyaru secretly steals magical abilities from them, eventually becoming immune to drugs and immensely powerful. Keyaru uses his stolen abilities to escape and disguise himself as Leonard, Flare's Imperial Commander, and, once alone with Flare, heals away her ability to use magic, rendering her defenseless. After repeatedly breaking then healing her fingers, Keyaru rapes Flare before he heals her in order to alter her appearance and memories. After healing a dead bodyguard's face to look like Flare, Keyaru frames Leonard before he escapes with the real Flare. Keyaru decides to target his other abusers, Bullet and Blade, before seeking out the Demon Lord he previously defeated to find out what she had been trying to protect when she died. With Flare now an amnesiac, Keyaru renames her Freia, convinces her she is his servant and lover while he changes his face and takes the hero name Keyarga the Healer, leaving his weak name Keyaru behind.Keyarga decides he and Freia must leave the city. However, he also learns that Norn, Flare's younger, smarter and more sadistic sister, is returning to the city and he is determined to avoid her. Keyarga has a nightmare of his previous life. Every night, Flare would force him to pleasure her. Then the Sword Heroine, Blade, would beat him for touching Flare before sexually assaulting him since she could not sleep with Flare herself. Finally, Bullet, the Gun Hero, would violently rape him, claiming to love him before choking him unconscious. They later arrive at Lanaritta, a lawless city dominated by criminals who prey on the poor. With Halcyon Eye, Keyarga detects the town's water is contaminated, meaning everyone will soon be sick. Using his own immunity to poisons, Keyarga creates a cure from his blood and sells it to a merchant, promising to continue making more in exchange for half the profits. He next visits a slave trader and purchases a female ice wolf demi-human, noting that her rage has kept her conscious despite being infected and is interested in what will happen once she gets revenge against whoever she hates so much.Keyarga examines the girl's memories and learns she wants revenge against Jioral Kingdom because they are planning to take her village as slaves. Knowing the girl, Setsuna, has no warrior abilities, Keyarga offers to make her stronger using a skill stolen from another hero, but requires her true name to do it. Setsuna agrees, even though knowing her true name will give him control over her. To prove he can make her stronger, Keyarga has sex with Setsuna, powering her up. Making their way to Setsuna's village, they find Jioral soldiers torturing prisoners. Keyarga disguises himself as the Sword Hero and kills them while Freia gives him covering fire with her magic. Setsuna gets revenge by killing the soldier who enslaved her. Keyarga decides to bring down the corrupt Jioral Kingdom. Keyarga shows Setsuna that the ice wolves poisoned the water and gives her a choice: either make the poison strong enough to kill every human in Lanaritta, or replace the poison with medicine. Setsuna chooses the medicine. They have sex again and Setsuna willingly tells Keyarga her true name. In Jioral, Norn has returned and it is discovered Keyarga healed Leonard's face to look like him so as to cover up his escape. The King orders Leonard to find the real Keyarga.

New Characters

 * Keyaru
 * Flare Arlgrande Jioral/ Freia
 * Blade
 * Brett
 * Anna
 * Proum Jioral
 * Kureha Clyret
 * Knight Capitan
 * Setsuna
 * Kuinta

Main Events

 * Keyaru defeat the demon lord and obtains the Philosopher's Stone. He uses stone to rewind time to four years before he met princess Flare.
 * Keyaru gains the 'Eye of Truth' by forming a contract with spirit of the stars.
 * Keyaru develops a drug resistance earlier than beforehand, which results in Keyaru regaining his sanity much sooner.
 * Keyaru exacts revenge on Princess Flare by means of physical torture, rape and memory erasure. Flare becomes his slave under the name "Freia" and they escape the capital to the city of Ranalitta.
 * Keyaru purchases a demi-human from the Ice Wolf race named Setsuna. Keyaru promises Setsuna that he will help her take vengeance on those who persecuted her and her people in exchange for becoming his slave.
 * Keyaru, Freia and Setsuna manage to defeat the Jioral Kingdom forces and free Setsuna's village. AS promised, Setsuna completely devotes herself to Keyaru.

Trivia

 * The Author has used his other novel ' Cheat majutsu de Unmei wo Nejifuseru ' when he was referring 'A very old Hero called Sauge(Souji) ' in chapter 13 while they were hunting rabits.
 * Souji from 'Cheat majutsu de Unmei wo Nejifuseru ' is an ancestor of Sword saint Kureha Clyret as it is mentioned in Chapter 14.