A middle-aged woman, Kurara Sonoda, visited the Holmes Agency and requested to background check on a man called Kameda. According to the information that Kurara brought in, Kameda is an Engineer working for a home appliances maker. Ryōsuke, who took the case, left the office but soon came back with Kurara’s daughter, Aika. Aika secretly came over to Tokyo from Osaka, where the mother and daughter live, to spend time with Kameda.
As it turned out, Kameda was Aika’s boyfriend, and they were planning to get married. Kurara did not agree with their marriage because Kaneda was from Kantō region. She was simply trying to find fault in him. When pressed about the reason, she recounted that her late-husband was a textbook Kantō-ite, often clashing with her on cooking styles. Kurara, who underwent hardships after her husband’s early death, seemingly had hard time accepting a Kantō-ite like her husband.
The following day, the kuitan asked out Kurara for going to Yokohama for a walk with the intention of improving her image of Kantō. He took her to restaurants that serve Kantō-style tempura and oden to persuading her to accept the couple by explaining how exchange and merger of Kansai-style and Kantō-style created tasty foods. Just as they were about to eat Kantō-style Red bean soup, news that Kameda killed his company’s president reached the two.
Shocked by the news, the kuitan and Ryōsuke went to police to hear more details of the incident. Momo and Igarashi told that Kaneda was harshly reprimanded by the president prior to his murder and did not have an established alibi. Although Kameda claimed that he was on a business trip to Osaka, his story lacked proof, as the Osaka branch maintained that he had never come to Osaka. What was more, the first witness heard the president mumbling the word “Kameyama” right before he died.
The kuitan, who was allowed to meet Kameda, who was in custody, heard that he ate authentic takoyaki at a store somewhe
