Volume 23

ConPSItructing an Unusual Past (非日常な過去をΨ工せよHinichijō na Kako o Saikuseyo) is the 23rd volume of the Saiki Kusuo no Psi-nan, also known as The Disastrous Life of Saiki K., manga series.

Cover Conversation
Mrs. Kaidou: Now then my cute children... introduce yourselves. Kaidou Sora: I am Sora. Kaidou Toki: I am Toki! Kaidou Shun: I am...Shun...

Alternative Cover Conversation
Mrs. Kaidou: By the way...have you all finished your homework? Sora: Yes mom. Toki: Yup! Shun: ......

Character Comment
Mrs. Kaidou: It seems like you have been doing nothing but read manga for a while now...did you make sure to finish everything you needed to do first…?

Chapters
Note: Chapters with the label have NOT been adapted into the anime series.
 * Chapter 239: The DiPSIster of the School Physical
 * Chapter 240: Don't Forget Your Birthday PrePSInt!
 * Chapter 241: DiviPSIon Strategy, Start!
 * Chapter 242: PSIpot the Difference! The Perfect Beautiful Girl's Ordeal
 * Chapter 243: Welcome to PSIberspacePsi icon.png
 * Chapter 244: The Hero DiPSIster
 * Chapter 245: Trending on a Streaming PSItePsi icon.png
 * Chapter 246: ConPSItructing an Unusual Day
 * Chapter 247: ConPSItructing an Unusual Past (First Part)
 * Chapter 248: ConPSItructing an Unusual Past (Middle Part)
 * Chapter 249: ConPSItructing an Unusual Past (Middle Part 2)
 * Chapter 250: ConPSItructing an Unusual Past (Final Part)

Summary
Touma informs Kusuo that he now has evidence that Kusuo is a psychic. Kusuo remembers his past with Touma in elementary school. Kusuo has time-leaped to the past, to change the fact of Touma finding out, but will he succeed...?

Character Profiles

 * None

Author’s Comment
"My right shin has started to hurt. I do not remember hitting it on anything,but it still hurts. It does not cause me any problems when I walk, or in any other part of my daily life, but it feels a little swollen and it hurts when I press on it. This has been going on for over a month now...but I want to be someone who does not give in to pain like that. I want to see you."

- Asou Shuuichi

Trivia

 * This volume, along with Volume 15 and Volume 24, has the highest number of chapters with 12
 * This volume, along with Volume 15, has the highest number of pages with 200
 * This volume has the most characters featured on a volume cover, with 4
 * This volume cover is the 3rd and final to not feature Saiki Kusuo
 * The other times being Volume 12 and Volume 22
 * Asou-sensei's sketch for his comment section for this volume appeared in Reawakened Episode 2 right at the start of Chapter 244's anime adaptation.