The Man Who Knew Too Much (知りすぎていた男 Shiri Sugite Ita Otoko) is the 9th chapter of the Prison School manga, serialised in Weekly Young Magazine on April 4th, 2011 and published in tankobon format in Volume 2 on October 6th, 2011.


Kiyoshi has a panic attack in his morning shower after his plot is found out by Gakuto, believing that he will inform the USC about his breakout plan. Gakuto enters the bathing area and offers to wash his back (a sumo assistant's act to his 'yokozuna' or sumo champion), and Kiyoshi refuses.The boys find out that Hana is to continue her duties as warden after school hours, to their dismay. Gakuto tries signalling to Kiyoshi with a sumo stance to his disdain. Kiyoshi then goes to dispose of the tree litter in the waste disposal area, but forgets to take the laden wheelbarrow with him.

Kiyoshi tries to continue digging the hole when he sees Hana and covers it with some refuse. Hana, to his relief, challenges him about whether he told anyone about the peeing incident to embarass her which he denies. Hana then threatens to kill him and then commit suicide ('seppuku') if he doesnt urinate in front of her. After forcing him to face her, he is about to urinate when Gakuto arrives with the trash Kiyoshi forgot to pick up. Kiyoshi thanks him when Hana retreats back to the prison block, and when they are alone in the waste disposal area, Gakuto declares his intention to aid the breakout plan.




Prison School by Akira Hiramoto
Volume 1:
Volume 2:
Volume 3:
Volume 4:
Volume 5:
Volume 6:
Volume 7:
Volume 8:
Volume 9:
Volume 10:
Volume 11:
Volume 12:
Volume 13:
Volume 14:
Volume 15:
Volume 16:
Volume 17:
Volume 18:
Volume 19:
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Not in Volumes:
Non-Canon Chapters
Fukukaichou Gambaru:
Anime Promotion:
Other Series:
Other Series:
  • Fukukaichou Gambaru
  • Agonashi Gen to Ore Monogatari
  • Me and The Devil Blues
  • Yarisugi Companion to Atashi Monogatari
  • Sono Tomodachi no Gimon Ari
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