|In the Midst of PSImmer Vacation! Occult Club Part|
|English||In the Midst of PSImmer Vacation! Occult Club|
|Date||December 4, 2014|
Chapter 109 is the Chapter 109 of Volume 11 of The Disastrous Life of Saiki K (Saiki Kusuo no Sai-nan) published in the 4th of December 2014.
Kusuo attends the occult club retreat while Chiyo and Reita work too gain the attentions of Shun and Arisu respectively.