Absolute Regression (Korean: 절대회귀) is a martial arts fantasy series originally serialized as a web novel by the author Jang Young-hoon (장영훈). The narrative follows a determined protagonist who utilizes a forbidden technique to return to the past and rewrite a tragic history. The work has since been adapted into a popular webtoon, expanding its reach to international audiences while retaining the complex factional politics and high-stakes action of the source material.