Red Pants

Hatamoto Ooka Gentaro was deeply committed to a future with a beautiful girl named Omachi, a relationship facilitated by his love of the shamisen. Omachi was stalked by a ronin named Akiyama Kanosuke, and at one point, Gentaro and Akiyama dueled at Matanuiyama, but the confrontation was left unresolved when Omachi, sensing urgency, called the authorities. Meanwhile, Gentaro's uncle, Kii-no-kami, concerned about Gentaro's whereabouts, ordered him to investigate a conspiracy by Tachibana Tadama, a tyrannical director of Hachijo who exercised his power oppressively in Shimousa Iioka. Gentaro attempted to leave on a journey with Omachi but was obstructed by his uncle's retainers.

Three beautiful daughters grew up in a dog and cat care clinic. The eldest was named Takako (Keiko Tsushima), the second was Tsugumi (Keiko Awaji), and the third was Mihato (Hibari Misora). Mihato was still a pretty seventeen-year-old girl, but she considered herself as mature as her older sisters. Mihato knows that Tsugumi is friends with Ippei Yaguchi (Masao Wakahara) and acts as a love messenger between them, but she didn't know that Takako is also in love with Ippei...

A woman in a bar was killed at a new construction site in an apartment building, and a handbag containing the value of five million yen was taken away. Detective Kuribayashi, who was involved in the investigation, turned his eyes to Kishida Ryohei, a cabaret musician who lives in a nearby apartment. He had a criminal record for stabbing his wife, who had betrayed him, and a match he worked for had fallen at the scene of the murder. However, Kishida, who appeared at the police station, stubbornly denied the crime, and he returned to his apartment without physical evidence.However, the residents of the apartment who learned of this had been cold-blooded and rumored to be a murderer. Kishida has a secret crush on the stripper Tachibana Yumi, who lives in the apartment directly opposite.However, Yumi has a lover of a plumber named Maki Shinji.

Former boxer Goro Kawasaki was attacked by the organizer of the fights for knocking out his opponent because he could not stand the fight. He is being released from prison, where he was imprisoned on charges of causing bodily harm. He meets his younger brother Fumio, who is going to become a boxer and dreams of owning his own car repair shop. Goro tries to help Fumio, but is refused. At this time, the boss of the underworld, whom Goro met in prison, is released, and this escalates into a confrontation involving Goro and Fumio.

During the era of Tokugawa Ieyasu, one night a carver named Fujijiro was murdered. Immediately launching an investigation, Denhichi, accompanied by Otoshi and Take, toured the entertainment houses of Ryogoku. There, they discovered a connection between an acrobat and the incident. On their way home, Otoshi unexpectedly encountered an old friend, Inosuke, nervously buying a dagger. Inosuke, a clerk at the Kashimaya store, was in love with Oko, a secret lover of Bunzaemon. Amidst this, Seihei, the head clerk, was murdered by someone, and a dagger belonging to Inosuke was found at the scene, leading Gohei to suspect Inosuke as the culprit. However, Otoshi was hiding Inosuke. Driven by Otoshi's plea and a professional instinct that Inosuke wasn't the perpetrator, Denhichi desperately searched for the real culprit.