Lesson 506 is the 506th chapter of the Gintama series.
As Gintoki's group was attacked, Sarutobi confirmed that the insurgents were from the Iga Clan, where the Oniwabanshuu originated. However, unlike the Oniwabanshuu, they only work for money and have no loyaties to the Shogun. Suddenly, Shinpachi and Kagura were immobilised, and Sacchan realised that the people behind this attack were Iga's heads: Fujibayashi Gaimon, Momochi Rappa and Hattori.
Meanwhile, Hattori showed the Shogun's head to the Harusame and convinced them to leave. Before leaving, Kamui and Okita threw swords at each other for the last time, and the spacecraft fell down after an explosion.
In the forest, the two heads of Iga talked about the Harusame's attack on the village, forcing the Iga to work for them. Upon learning that the Shogun is dead, Fujibayashi revealed his plan to reduce the Shogun's power. Though, Hijikata cut his leg and Kondou turned up from the shinobi's lines to save the others. Much to everyone's shock, Shige Shige walked out, ordered the shinobi to attack the insurgent.
Characters in order of appearance
- Sakata Gintoki
- Shimura Shinpachi
- Sarutobi Ayame
- Hijikata Toushirou
- Kondou Isao
- Fujibayashi Gaimon
- Momochi Rappa
- Okita Sougo
- Hattori Zenzou
- Tokugawa Shige Shige
- Hattori Zenzou: It's over. You guys' master is already dead. You no longer have anything to protect.
- Okita Sougo: You can pick your own reason to fight. Make sure you learn the fact that on earth, we have what's called battles for revenge, villain.