Redo of Healer (Japanese: 回復術士のやり直し 〜即死魔法とスキルコピーの超越ヒール〜, Hepburn: Kaifuku Jutsushi no Yarinaoshi: Sokushi Mahō to Sukiru Kopī no Chōetsu Hīru, lit.

"The Healer's Do-Over: Transcendent Healing Through Insta-Kill Magic and Skill Copying"), also known in Japan as KaiYari for short, is a Japanese light novel series written by Rui Tsukiyo and illustrated by Shiokonbu.

A manga adaptation with art by Sōken Haga has been serialized online via Kadokawa Shoten's Young Ace Up website since October 2017.

Thus, using his healing magic, enhanced by the magic-enhancing properties of the Philosopher's Stone on the world itself, he goes back four years into the past, deciding to redo everything and get revenge on the ones who abused him and take down a corrupted empire.

[21] A spin-off manga series illustrated by Ken Nagao, titled Kaifuku Jutsushi no Omotenashi (Hospitality of Healer), was serialized in Young Ace Up from January 18, 2021, to May 23, 2022 and collected into two volumes.

[45] Since its airing, the anime adaptation of Redo of Healer gained higher than average percentage of female viewers and Tsukiyo expressed their surprise on Twitter.

[47] The series garnered controversy, particularly due to its depiction of extreme violence, gratuitous amounts of sexual content, rape and slavery, most elements often being used as a plot device, especially in the first two episodes.