Shigenori Yamashita

A gang of evil ninjas has stolen the sacred sword of the Lady Mayu and are demanding that her family exchange her for the family treasure. The world's greatest swordsman, Shuranosuke Sakaki, is called in to get the sword back.

After participating to a previous show where they have to bet or be challenged to any kind of competitions, the losing members of the Gaki no Tsukai are selected to spend 24 hours in a setting which they have no knowledge of the theme nor the course of the events. They are exposed to various absurd and crazy situations nonstop for 24 hours and must refrain from laughing. If they do so, hang-men appear and hit the rule breakers with a weapon (the weapon varies every year).