Hard-Boiled is the anime's fourth episode, pushing the Amusement Park Arc forward. As bounty hunters swarm the theme park, Shin traces the attacks to the Dondenkai organization, and a trip into the haunted house ends with the family cornered by its top killers, Boiled and Obiguro.
The family's day out grows deadlier as one bounty hunter after another surfaces among the crowds. Shin takes down a particularly nasty opponent who fights with poison, and in doing so uncovers the hand of a shadowy killing firm called Dondenkai pulling strings behind the recent attacks.
Hoping to keep the outing feeling normal, Sakamoto pushes on toward the next attraction. Aoi and little Hana ask to try the haunted house, so the group steps inside. Waiting for them there are Dondenkai's two heaviest hitters, Boiled and Obiguro, whose ambush closes the episode on a dangerous note.
Shin defeats the poison-using assassin and links the day's chaos to the Dondenkai company. Sakamoto continues shielding his loved ones while fending off waves of fortune seekers drawn by the reward.
Boiled and Obiguro debut, cornering the group inside the haunted attraction and setting up the arc's central confrontation.

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"Hard-Boiled" is the title of Sakamoto Days episode 4, which introduces Dondenkai's two top killers, Boiled and Obiguro, who ambush the family inside the amusement park's haunted house.
In episode 4, Shin defeats a poison using assassin and traces the day's attacks to a killing firm called Dondenkai. Sakamoto keeps shielding his family through waves of bounty hunters, and the outing ends with Boiled and Obiguro ambushing the group inside the haunted house.
Boiled and Obiguro are Dondenkai's two heaviest hitters, who debut in episode 4 by cornering Sakamoto's family inside the amusement park's haunted house.
In episode 4, Shin defeats a poison using assassin and uncovers that a shadowy killing firm called Dondenkai is behind the day's attacks.
Sakamoto Days episode 4, "Hard-Boiled," aired on February 1, 2025, adapting the tail end of chapter 8 through chapter 11.
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