Following a ruthless attack from an imperialist criminal gang known as the Masked Demons, Shinsengumi's Eighth Division—the law-enforcing squad in Kyoto that remains faithful to the shogunate—is nearly annihilated, with its sole survivor, Heisuke Toudou, critically injured. Urged to rebuild the Shinsengumi by the local feudal lord, Katamori Matsudaira, Toudou decides to offer eight convicts the chance to redeem themselves: they must abandon their old names and become substitutes for the eight Shinsengumi captains. All accept but one, who ends up immediately executed by the former assassin Sakuya. However, Toudou has a hard time transforming the seven reformed criminals into loyal servants. Due to his lack of discipline, the impulsive and vengeful Ichibanboshi, whose family perished at the hands of the Masked Demons, threatens the success of Toudou's strategy. As Toudou pledges to protect the shogunate against imperialists and foreign invaders, other factions, such as Kogorou Katsura's group, start to put their plans in motion with only one goal in mind—to seize power at the dusk of the Edo period.

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In celebration of Bucchigire!'s premiere, Tokyo Tower held a collaborative event between July 8, 2022, and August 21, 2022. The series was released on Blu-ray and DVD in Japan on October 26, 2022.