Retro Mystery Club Vol.1: The Ise-Shima Case

Retro Mystery Club Vol.1: The Ise-Shima Case is a 2019 adventure game. It is a mystery-themed game set in modern-day Tokyo where the player takes the role of a detective along with their partner Ken. After the discovery of the death of a homeless man, various clues are left behind, leaving to an incident that involves black pearls. The game began development in 2010 when the game's producer Junji Seki met with manga artist Arai Kiyokazu to collaborate on developing an adventure game. While initially planning a game for feature phones, they found the market for such products failing and put the project on hold for a few years.