Chapter 126

 is the Chapter 126 of Volume 12 of The Disastrous Life of Saiki K (Saiki Kusuo no Sai-nan) published in the 4th of February 2015.

Characters

 * Saiki Kusuo
 * Toritsuka Reita
 * Saiki Kusuke
 * Saiki Kuniharu
 * Takahashi
 * Teruhashi Makoto

Abilities Used

 * Telepathy
 * Flight
 * Time Leap

Summary
The butterfly affect, something so small can bring a huge event. Kusuo changed the meeting of his parents so slightly that his world has become an actual disaster.

November 22, 2014. Kusuo can not believe the world has changed this much in 20 years. He time travel back the past, but he can not arrive at the same time he actually arrived to the past before changing events. He is stuck at this alternate timeline. He knows there has to be a way to fix the past but for the time being he needs to find out what happened in this world. He hears Reita in the distance, Reita can not believe it is Kusuo.

Reita is sporting a mohawk and is happy to see Kusuo. Kusuo states the Reita he knows is not like this, however he could ask him what happened. He tells Reita he lost his memory, Reita is confused on how he has forgotten things and yet he remembers him, which he says is sort of gross. Reita continues by telling him that Kusuo promised to be his dog, Kusuo does not believe him and to start explaining. Reita is not sure where to start and considers to tell him what happened after World War III. Kusuo stops him by telling him to start before then, Reita is surprised that he has forgotten about that time. The war happened 2 years ago, and Reita shows off a futuristic watch, the K-watch. Kusuo states this is supposed to be the present, not the future. Reita shows him an article on the watch about World War III, Kusuo tells him to close the porn windows. Reita tells him the war started due to an inventor, Kusuo plans to just erase him from the past if he needs to. Reita then says it was Kusuke, Kusuo is surprised that it was someone in his family. Kusuo couldn't believe it was his brother, but after remembering what he says about people he realized he would create a war.

Kusuo does not understand why the him from this time did not stop Kusuke. Nevertheless he plans to go find Kusuke and punch him. Reita asks Kusuo where he is going, that is when Kusuo tells him Kusuke is his older brother and is going to talk to him. Reita tells him it is impossible to talk to him since he, Kusuo, is dead. Kusuo is surprised again. Reita goes on and tells him it happened about 3 years ago, the first time they met Kusuo was a ghost. This is 2nd time losing his memories seeing as ghost forget about all the memories of when they were alive and people can not see ghost. Reita goes on that people can not touch him and he is startled that he can touch him. Kusuo punches him and Reita is surprised that he has a strong punch. Kusuo finally realizes why he did not stop Kusuke, he is dead, it is a world without him. Reita gets happy that Kusuo is alive, it is one of the greatest things to happen in the messed up world they are in. Kusuo is touched by what he says, however Reita continues by saying he can no longer ask him to look at the color of girl's underwear and Kusuo gets annoyed and asking him what exactly did he made ghost him do. Kusuo ignores it, seeing as thanks to him he knows the situation, and leaves using flight. Reita wonders who is he.

In a remote area full of guards, Kusuo finally reaches Kusuke, who points a gun to him. Kusuke goes into shock, realizing that it is Kusuo. Kusuo says he does not know why he started a war but he will set him straight. Kusuke starts crying, happy to see Kusuo again. Kusuke then asks him how is he alive, Kusuo tells him that first he should answer him his questions. Kusuke goes on and restates the whole plot of what has happened in the past couple of chapters, Kusuo asks if he is some sort of prophet. Kusuke sees that he is correct so Kusuo asks why would he start a war, Kusuke tells him he was not trying to make one. People started fighting due to what Kusuke invented. He really does not care about it now and asks Kusuo they should play a game. Kusuo tells him he does not know the game and asks what he invented, turns out it was a time machine. Kusuo is in shock. Kusuke goes on about how he was bored that Kusuo was no longer around so he invented it to bring him back, seeing as he is here he can just throw it away. Kusuo asks him if it works, Kusuke says it is useless since it can only travel one day into the past.

Kuniharu is telling the story on how he and Kurumi met, this time Kusuo paying attention completely. Kuniharu is surprised that Kusuo is seriously paying attention to the story, he tells him to hurry up and continue the story. Kusuo used the time machine Kusuke made, time travel to the past, this time not changing events, and goes back to his present. Kusuo is not sure he is in the right timeline so to confirm it he is willing to pay attention to the story. Kuniharu tells Kusuo that he would usually tell him that he is tired or to tell it a wall. Kusuo tells him to hurry up and to tell the 13 other chapters. Kusuke arrives to tell his parents congratulations. Kusuo sighs, he does not want to admit it but this was lost to him. Kusuke asks Kusuo what is wrong, it looks like he came back from a time slip.

In an omake page, we see the lives of the other characters in the alternate 2014 timeline. Riki improved his mohawk, Shun is the leader of the rebel forces called "Dark Reunion" that has no members, Kineshi is a disaster relief volunteer, Takahashi is a casualty, and Kokomi is the head of a religious organization called "Church of Offu" that has 2/3 of the Japanese population as her followers.