NIJISANJI and Daiyonkyokai launch first PARALLEL CASE: 2434 chapter

NIJISANJI has announced its first collaborative content project with Daiyonkyokai, PARALLEL CASE: 2434, beginning with CASE 01: Mashiro Kairi’s Record. EPISODE 01, “Kasuminoso no Iwaku,” is available to experience for free. Players work with NIJISANJI livers from “another world” to investigate and solve an incident. The story follows the NIJISANJI Ruins Exploration Club, formed by Mashiro Kairi, Kurusu Natsume, and Sister Claire. For their first project, the trio visits the reportedly haunted abandoned apartment building Kasuminoso, where an unusual incident occurs during their exploration and commentary. According to the official project page, EPISODE 01 is playable on PC and smartphones from August 21, 2026. EPISODE 02, “Mashiro Kairi’s Ruins Exploration Pouch,” is also for PC and smartphones and is priced at ¥5,000. It follows Kurusu Natsume and Sister Claire as they seek clues to restore Mashiro after they notice something is wrong with him days after the Kasuminoso exploration. The investigation is accessible through the official PARALLEL CASE: 2434 website.