江戸川乱歩・ (Series) favorite_border

[DeepL Translation - needs review] Soichi, the eldest son of the Hashiba family, suddenly returns home after more than ten years. At that time, the Hashiba family receives a letter of warning from the rumored bandit "Kaijin Nijumenso," who is after the jewelry belonging to the Romanoff royal family. The curtain rises on the memorable first confrontation between the ever-changing and delightful Kaijin Nijumenso and the famous detective Akechi Kogoro.

(Translator: DeepL)