|An ExPSIlent Wife and Mother!? Mom's Class Reunion|
Chapter 133 is the 133th chapter of Volume 13 of The Disastrous Life of Saiki K (Saiki Kusuo no Sai-nan) published in the 1st of May 2015.
Saiki's mom goes to a high school reunion for the first time in 20 years. It turns out the whole reunion was a hoax put on by Kurumi's former classmate Masuda and some actors to scam her for money. Of course Saiki can't let this happen.