Change Guy
Quantum Mistake
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Change Guy

Alternative Titles

Japanese: 체인지가이
English: Quantum Mistake
More titles


Type: Manhwa
Volumes: 31
Chapters: 338
Status: Finished
Published: 1998 to 2004
Genre: Action Action
Demographic: Shounen Shounen
Serialization: None
Authors: Son, Eun-Ho (Story), Choi, Myung-Soo (Art)


Score: 7.401 (scored by 14441,444 users)
1 indicates a weighted score.
Ranked: #37082
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #6540
Members: 3,014
Favorites: 30


Ranked #3708Popularity #6540Members 3,014
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Volumes: /31
Chapters: /338


It's nature vs. nurture when a nerd swaps bodies with the toughest guy in school! Tuji and Usoo have swapped...their bodies! After becoming the subjects of a mad scientist's experiment with her latest invention - the quantum teleporter - their bodies are switched, leaving only their minds and spirits intact. Usoo, who was once a model student, must face the life of Tuji, a teenage menace. Never having an enemy in his life, he now has to deal with the handful of Tuji's list, but will his kinder, gentler demeanor ward off his rivals? Or will survival determine his future? Will he become the hardened fighter that matches his new exterior?


Change Guy had one volume published in English as Quantum Mistake by ADV Manga on August 17, 2004.



Oct 1, 2014
Quite a nice read, interesting twists(some that could have been without) , has great potential, sadly it was cut short which did not allow many characters to be fully developed, while others just disappeared.I recommend only reading the first half, cos the second was a sortta a letdown
Jul 15, 2013
This Manwha was a desperate search for a manga similar to The Breaker. The fighting is pretty good, and the art compliments the action very well. It felt realistic if you put aside the fact that every single South Korean guy only wants to fight and kill one another! I wish the author would have spent more time on the characters' back stories, but at least it wasn't like Naruto!

It may have been the translators fault, but the language used was very repetitive in a lot of places. Lines like, "he has surpassed human limitations!" made me think, either the characters were ...
Oct 25, 2021
Mixed Feelings
If you're going to read it all in one sitting or as quickly as possible, you'll notice how quick it is to just switch genres/story direction. It has no real tone or idea with what it wants to be, from the first chapter you expect it to have some sci-fi elements, with the body-switching but the ones responsible aren't even mentioned until the end of the story. It also just leaves one of the two characters who should be part of the focus of this story basically braindead and ignored for more than half of the story and even then he's ignored

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Poll: Change Guy Chapter 338 Discussion
workisnotfun - Apr 30, 2012
10 repliesby uzee »»
Dec 31, 2019 8:05 PM
Poll: Change Guy Chapter 131 Discussion
Rasco - Mar 23, 2013
1 repliesby _Dazzle_ »»
Oct 19, 2015 7:43 PM
Poll: Change Guy Chapter 118 Discussion
Rasco - Mar 23, 2013
1 repliesby _Dazzle_ »»
Oct 19, 2015 7:05 PM
Poll: Change Guy Chapter 337 Discussion
Rasco - Apr 7, 2013
0 repliesby Rasco »»
Apr 7, 2013 9:56 AM
Poll: Change Guy Chapter 336 Discussion
Rasco - Apr 7, 2013
0 repliesby Rasco »»
Apr 7, 2013 9:49 AM