A bloodthirsty killer Gengobei is actually Kazuemon FUWA, and at the end, he returns to being a loyal vassal immediately after he receives an invitation to participate in the raid.
猟奇殺人鬼の源五兵衛は実は不破数右衛門その人で、最後に討ち入りの迎えが来るや即座に忠義に生きる義士にもどる。