|The Peak Of ExPSItement! Karaoke Party|
|English||The Peak Of ExPSItement! Karaoke Party|
|Date||July 4, 2014|
Chapter 90 is the ninetieth chapter of Volume 9 of The Disastrous Life of Saiki K (Saiki Kusuo no Sai-nan) published in the 4th of July 2014.
Saiki's class has a karaoke party and Saiki is only there for the Grand Chocolate Parfait. However, everyone in the class must sing, and Nendou's voice has the power to kill...